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Ecological Niche Modelling Reveals the Peculiarities of Ecological Disjunction Between Two Sympatric Racerunners in Kazakhstan:Eremias lineolata(Nikolsky,1897)and Eremias scripta(Strauch,1867)
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作者 Marina A.CHIRIKOVA Dmitry V.MALAKHOV 《Asian Herpetological Research》 SCIE CSCD 2023年第2期123-137,共15页
The ecological-niche models for two sympatric species,Eremias lineolata(Nikolsky,1897)and Eremias scripta(Strauch,1867),reveal evidence of spatial and temporal disjunction in the actual niches of both species.Eremias ... The ecological-niche models for two sympatric species,Eremias lineolata(Nikolsky,1897)and Eremias scripta(Strauch,1867),reveal evidence of spatial and temporal disjunction in the actual niches of both species.Eremias lineolata demonstrates a wide range of adaptations and,at the same time,has a greater need for winter precipitation and minimal temperature than E.scripta.Possible explanations for the thermal diversity of both species are provided.Thermal variables(monthly temperatures,monthly solar radiation,etc.)are traditionally important for ectotherm animals.Interestingly,as many as half of the key variables in both species are related to different aspects of environmental water balance(precipitation,air humidity,vapor pressure).There are several ways in which moisture may impact the lizard’s life cycle.Soil humidity is related to soil temperature and may be important during winter hibernation.In summer,soil humidity may support successful embryogenesis.Precipitation during the warm months is a key factor in maintaining the moisture content of the soil.In winter,snow cover provides a better thermal balance of the soil’s top layers where winter shelters are housed.Ecological niche modeling(ENM)is an interdisciplinary approach combining the geographical,climatic,ecological,and biological aspects of the wellbeing of species.This interdisciplinary approach lifts biological studies onto a new,integrative level,providing a comprehensive view on species biology and answering the questions that might not be answered if the traditional methods for studying animals were used alone. 展开更多
关键词 ecologY Kazakhstan niche modelling racerunners species distribution
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Human Settlement Evaluation in Mountain Areas Based on Remote Sensing,GIS and Ecological Niche Modeling 被引量:7
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作者 ZHAO Jian XU Min +1 位作者 LU Shi-lei CAO Chun-xiang 《Journal of Mountain Science》 SCIE CSCD 2013年第3期378-387,共10页
The Qinghai-Tibet Plateau is the word's highest and largest plateau. Due to increasing demands for environment exploration and tourism, a large transitional area is required for altitude adaptation. Hehuang valley, w... The Qinghai-Tibet Plateau is the word's highest and largest plateau. Due to increasing demands for environment exploration and tourism, a large transitional area is required for altitude adaptation. Hehuang valley, which locates in the transition zone between the Loess Plateau and the Qinghai-Tibet Plateau, has convenient transportation and relatively low elevation. Our question is whether the geographic conditions here are appropriate for adapted stay before going into the Qinghai-Tibet Plateau. Therefore, in this study, we examined the potential use of ecological niche modeling (ENM) for mapping current and potential distribution patterns of human settlements. We chose the Maximum Entropy Method (Maxent), an ENM which integrates climate, remote sensing and geographical data, to model distributions and assess land suitability for transition areas. After preprocessing and selection, the correlation between variables and spatial auto- correlation input data were removed and 106 occurrence points and 9 environmental layers were determined as the model inputs. The threshold- independent model performance was reasonable according to lO times model running, with the area under the curve (AUC) values being 0.917± 0.01, and 0.923±0.002 for test data. Cohen's kappa coefficient of model performance was 0.848. Results showed that 82.22% of the study extent was not suitable for human settlement. Of the remaining areas, highly suitable areas aceounted for 1.19%, moderately for 5.3% and marginally for 11.28%. These suitable areas totaled 418.79 km2, and 86.25% of the sample data was identified in the different gradient of suitable area.The decisive environmental factors were slope and two climate variables: mean diurnal temperature range and temperature seasonality. Our model showed a good performance in mapping and assessing human settlements. This study provides the first predicted potential habitat distribution map for human settlement in Ledu County, which could also help in land use management. 展开更多
关键词 Human settlement Remote sensing Suitability assessment ecological niche modeling
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Predicting the potential geographic distribution of Bactrocera bryoniae and Bactrocera neohumeralis(Diptera: Tephritidae) in China using MaxEnt ecological niche modeling 被引量:7
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作者 Jing Wan QI Guo-jun +3 位作者 MA Jun Yonglin REN WANG Rui Simon MCKIRDY 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2020年第8期2072-2082,共11页
Bactrocera bryoniae and Bactrocera neohumeralis are highly destructive and major biosecurity/quarantine pests of fruit and vegetable in the tropical and subtropical regions in the South Pacific and Australia.Although ... Bactrocera bryoniae and Bactrocera neohumeralis are highly destructive and major biosecurity/quarantine pests of fruit and vegetable in the tropical and subtropical regions in the South Pacific and Australia.Although these pests have not established in China,precautions must be taken due to their highly destructive nature.Thus,we predicted the potential geographic distribution of B.bryoniae and B.neohumeralis across the world and in particular China by ecological niche modeling of the Maximum Entropy(Max Ent)model with the occurrence records of these two species.Bactrocera bryoniae and B.neohumeralis exhibit similar potential geographic distribution ranges across the world and in China,and each species was predicted to be able to distribute to over 20%of the globe.Globally,the potential geographic distribution ranges for these two fruit fly species included southern Asia,the central and the southeast coast of Africa,southern North America,northern and central South America,and Australia.While within China,most of the southern Yangtze River area was found suitable for these species.Notably,southern China was considered to have the highest risk of B.bryoniae and B.neohumeralis invasions.Our study identifies the regions at high risk for potential establishment of B.bryoniae and B.neohumeralis in the world and in particular China,and informs the development of inspection and biosecurity/quarantine measures to prevent and control their invasions. 展开更多
关键词 fruit fly Bactrocera bryoniae Bactrocera neohumeralis ecological niche modeling MAXENT potential geographic distribution habitat suitability
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Evolution of biogeographic disjunction between eastern Asia and North America in Chamaecyparis:Insights from ecological niche models 被引量:2
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作者 Ping Liu Jun wen Tingshuang Yi 《Plant Diversity》 SCIE CAS CSCD 北大核心 2017年第3期111-116,共6页
The disjunct distribution of plants between eastern Asia(EA) and North America(NA) is one of the most well-known biogeographic patterns. However, the formation and historical process of this pattern have been long deb... The disjunct distribution of plants between eastern Asia(EA) and North America(NA) is one of the most well-known biogeographic patterns. However, the formation and historical process of this pattern have been long debated. Chamaecyparis is a good model to test previous hypotheses about the formation of this disjunct pattern as it contains six species disjunctly distributed in EA, western North America(WNA)and eastern North America(ENA). In this study, we applied ecological niche models to test the formation of the disjunct pattern of Chamaecyparis. The model calibrated with the EA species was able to predict the distribution of eastern NA species well, but not the western NA species. Furthermore, the eastern Asian species were shown to have higher niche overlap with the eastern North American species. The EA species were also shown to share more similar habitats with ENA species than with WNA species in the genus. Chamaecyparis species in WNA experienced a significant niche shift compared with congeneric species. Chamaecyparis had a low number of suitable regions in Europe and the middle and western NA during the Last Glacial Maximum(LGM) period, and became extinct in the former region whereas it retains residual distribution in the latter. The extirpations in western NA and Europe in response to the late Neogene and Quaternary climatic cooling and the more similar habitats between ENA and EA ultimately shaped the current intercontinental disjunct distribution of Chamaecyparis. Both current hypotheses may be also jointly applied to explain more eastern Asian and eastern North American disjunctions observed today. 展开更多
关键词 DISJUNCTION Eastern Asia North America CHAMAECYPARIS ecological niche models MAXENT
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Potential distribution and ecological dimensions of four species in the genus Physopelta(Hemiptera:Largidae) 被引量:1
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作者 朱耿平 王晓静 +1 位作者 卜文俊 刘国卿 《Entomotaxonomia》 CSCD 北大核心 2012年第2期192-200,共9页
Our knowledge of the identity and distribution of most species on earth is remarkably poor. Species in hotspots tend to be scarce within their range which increases their probability of extinction. In this study, we u... Our knowledge of the identity and distribution of most species on earth is remarkably poor. Species in hotspots tend to be scarce within their range which increases their probability of extinction. In this study, we used ecological niche modeling (ENM) to estimate dimensions of realized niches of 4 species that are totally (Physopelta robusta St^l and Physopelta slanbuschii Fabricius) or partially (Physopelta cincticollis StS,1 and Physopelta quadriguttata Bergroth) distributed in the Indo-Myanmar and South Central China hotspot, and predicted additional sites where they might be found. Our findings suggest that the range of the 4 species could extend beyond their presently known distributions, which might be useful for future field surveys. Niche overlap was modeled between the 4 species, with R slanbuschii and R robusta showing more tolerance to temperature and P quadriguttata and P. slanbuschii more tolerance to precipitation. This study presents one more case study which highlights the ecological approach for taxonomic study in biodiversity conservation, especially of poorly, little known, and localized endemic species. 展开更多
关键词 HETEROPTERA Physopelta ecological niche modeling Indo-Myanmar hotspot South Central Chinahotspot insect conservation
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Visualizing Patterns of Genetic Landscapes and Species Distribution of Taxus wallichiana(Taxaceae),Based on GIS and Ecological Niche Models 被引量:7
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作者 于海彬 张镱锂 +1 位作者 高俊刚 祁威 《Journal of Resources and Ecology》 CSCD 2014年第3期193-202,共10页
The Chinese yew(Taxus wallichiana),which is widely distributed in the Himalayas and in southern China,is now on the edge of extinction.In order to understand the evolutionary processes that control the current diver... The Chinese yew(Taxus wallichiana),which is widely distributed in the Himalayas and in southern China,is now on the edge of extinction.In order to understand the evolutionary processes that control the current diversity within this species at the genetic and ecological levels,its genetic patterns and range dynamics must first be identified and mapped.This knowledge can then be applied in the development of an effective conservation strategy.Based on molecular data obtained from 48 populations of T.wallichiana,we used GIS-based interpolation approach for the explicit visualization of patterns of genetic divergence and diversity,and a number of potential evolutionary hotspots have been specifically identified within the genetic landscape maps.Within the maps of genetic divergence and diversity,five areas of high inter-population genetic divergence and six areas of high intra-population genetic diversity have been highlighted in a number of separate mountain regions,and these evolutionary hotspots should have the priority to be protected.Furthermore,four geographical barriers have been identified: the eastern Himalayas,the Yunnan Plateau,the Hengduan Mountains and the Taiwan Strait.According to ecological niche modeling(ENM),the populations of T.wallichiana within the Sino-Himalayan Forest floristic subkingdom experienced westward expansion from the periods of Last Inter-glacial to Last Glacial Maximum(LGM).Following the LGM,the distribution range overall became reduced and fragmented.These findings challenge the classic mode of contraction-expansion in response to the last glaciation.In conclusion,our findings suggest that the changes in geographical landscapes and climate that occurred during the Quaternary resulted in current genetic landscape patterns. 展开更多
关键词 genetic landscape PHYLOGEOGRAPHY GIS ecological niche models(enms) HIMALAYAS
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Study on Ecological Strategy of Enterprises' Competition 被引量:1
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作者 Xu Fang Li Jianhua +1 位作者 Ly Hong Zhang He 《Ecological Economy》 2005年第3期36-39,共4页
The ecolotogical research of enterprises' competition is the front line of current research of enterprises ' competition strategy : This text applies the competition principle of living creature in ecology to resea... The ecolotogical research of enterprises' competition is the front line of current research of enterprises ' competition strategy : This text applies the competition principle of living creature in ecology to research enterprises' competition problems .explains the ecological characterisiics of enterprises' competition, such as non-symmetry, crowded effect, density effect. competition-rejective effect, suitable resources niche and red queen effect etc., deduces the ecological model of enterprise' competition, and further analyzes enterprises' competition strategy; strategy R and strategy K. on the basis of enterprises' practices, Therefore enterprises' competition ecosystem theories have further been deepened and enriched. 展开更多
关键词 non-symmetry crowded effect competition-rejective effect niche ecosystem model ecological strategy
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Modelling the probability of presence of Aedes aegypti and Aedes albopictus in Iran until 2070
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作者 Mohammad Mehdi Sedaghat Faramarz Bozorg Omid +2 位作者 Mohammad Karimi Sajjad Haghi Ahmad Ali Hanafi-Bojd 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2023年第1期16-25,共10页
Objective:To determine the suitable ecological habitats of Aedes(Ae.)aegypti and Ae.albopictus in Iran due to climate change by the 2070s.Methods:All data relating to the spatial distribution of Ae.aegypti and Ae.albo... Objective:To determine the suitable ecological habitats of Aedes(Ae.)aegypti and Ae.albopictus in Iran due to climate change by the 2070s.Methods:All data relating to the spatial distribution of Ae.aegypti and Ae.albopictus worldwide,which indicated the geographical coordinates of the collection sites of these mosquitoes,were extracted from online scientific websites and entered into an Excel file.The effect of climatic and environmental variables on these mosquitoes was evaluated using the MaxEnt model in the current and future climatic conditions in the 2030s,2050s,and 2070s.Results:The most suitable areas for the establishment of Ae.aegypti are located in the southern and northern coastal areas of Iran,based on the model outputs.The modelling result for suitable ecological niches of Ae.albopictus shows that in the current climatic conditions,the southern half of Iran from east to west,and parts of the northern coasts are prone to the presence of this species.In the future,some regions,such as Gilan and Golestan provinces,will have more potential to exist/establish Ae.albopictus.Also,according to the different climate change scenarios,suitable habitats for this species will gradually change to the northwest and west of the country.The temperature of the wettest season of the year(Bio8)and average annual temperature(Bio1)were the most effective factors in predicting the model for Ae.aegypti and Ae.albopictus,respectively.Conclusions:It is required to focus on entomological studies using different collection methods in the vulnerable areas of Iran.The future modelling results can also be used for long-term planning to prevent the entry and establishment of these invasive Aedes vectors in the country. 展开更多
关键词 Aedes aegypti Aedes albopictus Dengue fever CHIKUNGUNYA ecological niche modeling Climate change
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Modelling the nesting-habitat of threatened vulture species in the caucasus:An ecosystem approach to formalising environmental factors in species distribution models
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作者 Rustam Pshegusov Victoria Chadaeva 《Avian Research》 SCIE CSCD 2023年第4期572-585,共14页
Abiotic factors play an important role in species localisation,but biotic and anthropogenic predictors must also be considered in distribution modelling for models to be biologically meaningful.In this study,we formal... Abiotic factors play an important role in species localisation,but biotic and anthropogenic predictors must also be considered in distribution modelling for models to be biologically meaningful.In this study,we formalised the biotic predictors of nesting sites for four threatened Caucasian vultures by including species distribution models(wild ungulates,nesting tree species)as biotic layers in the vulture Maxent models.Maxent was applied in the R dismo package and the best set of the model parameters were defined in the R ENMeval package.Performance metrics were continuous Boyce index,Akaike's information criterion,the area under receiver operating curve and true skill statistics.We also calculated and evaluated the null models.Kernel density estimation method was applied to assess the overlap of vulture ecological niches in the environmental space.The accessibility of anthropogenic food resources was estimated using the Path Distance measure that considers elevation gradient.The availability of pine forests(Scots Pine)and wild ungulates(Alpine Chamois and Caucasian Goat)contributed the most(29.6%and 34.3%)to Cinereous Vulture(Aegypius monachus)nesting site model.Wild ungulate distribution also contributed significantly(about 46%)to the Bearded Vulture(Gypaetus barbatus)model.This scavenger nests in the highlands of the Caucasus at a minimum distance of 5–10 km from anthropogenic facilities.In contrast,livestock as a food source was most important in colony distribution of Griffon Vulture(Gyps fulvus).The contribution of distances to settlements and agricultural facilities to the model was 45%.The optimal distance from Egyptian Vulture(Neophron percnopterus)nesting sites to settlements was only 3–10 km,to livestock facilities no more than 15 km with the factor contribution of about 57%.Excluding the wild ungulate availability,the ecological niches of studied vultures overlapped significantly.Despite similar foraging and nesting requirements,Caucasian vultures are not pronounced nesting and trophic competitors due to the abundance of nesting sites,anthropogenic food sources and successful niche sharing. 展开更多
关键词 Caucasian vultures ecological niche differentiation Maxent Nesting sites Species distribution models
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Genetic analysis and ecological niche modeling delimit species boundary of the Przewalski’s scorpion(Scorpiones: Buthidae) in arid Asian inland 被引量:1
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作者 Xueshu Zhang Gaoming Liu +2 位作者 Yu Feng Dexing Zhang Chengmin Shi 《Zoological Systematics》 CSCD 2020年第2期81-96,共16页
Reliable delimitation of venomous scorpions is not only consequential to toxicological studies but also instructive to conservation and exploration of these important medical resources.In the present study,we delimite... Reliable delimitation of venomous scorpions is not only consequential to toxicological studies but also instructive to conservation and exploration of these important medical resources.In the present study,we delimited species boundary for the the Przewalski’s scorpion from arid northwest China through a combined approach employing phylogenetic analysis,ecological niche modeling and morphological comparison.Our results indicate that the Przewalski’s scorpion represent an independent taxonomic unit and should be recognized as full species rank,Mesobuthus przewalskii stat.nov.This species and the Chinese scorpion M.martensii represent the eastern members of the M.caucasicus species group which manifests a trans-Central Asia distribution across the Tianshan Mountains range.We also discussed the likely geographic barrier and climatic boundary that demarcate distributional range of the the Przewalski’s scorpion. 展开更多
关键词 Mesobuthus species complex mitochondrial DNA ecological niche modeling distribution range
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Cryptosporidiosis threat under climate change in China:prediction and validation of habitat suitability and outbreak risk for human-derived Cryptosporidium based on ecological niche models
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作者 Xu Wang Yanyan Jiang +7 位作者 Weiping Wu Xiaozhou He Zhenghuan Wang Yayi Guan Ning Xu Qilu Chen Yujuan Shen Jianping Cao 《Infectious Diseases of Poverty》 SCIE CAS CSCD 2023年第2期72-86,共15页
Background Cryptosporidiosis is a zoonotic intestinal infectious disease caused by Cryptosporidium spp.,and its transmission is highly influenced by climate factors.In the present study,the potential spatial distribut... Background Cryptosporidiosis is a zoonotic intestinal infectious disease caused by Cryptosporidium spp.,and its transmission is highly influenced by climate factors.In the present study,the potential spatial distribution of Cryptosporidium in China was predicted based on ecological niche models for cryptosporidiosis epidemic risk warning and prevention and control.Methods The applicability of existing Cryptosporidium presence points in ENM analysis was investigated based on data from monitoring sites in 2011–2019.Cryptosporidium occurrence data for China and neighboring countries were extracted and used to construct the ENMs,namely Maxent,Bioclim,Domain,and Garp.Models were evaluated based on Receiver Operating Characteristic curve,Kappa,and True Skill Statistic coefficients.The best model was constructed using Cryptosporidium data and climate variables during 1986‒2010,and used to analyze the effects of climate factors on Cryptosporidium distribution.The climate variables for the period 2011‒2100 were projected to the simulation results to predict the ecological adaptability and potential distribution of Cryptosporidium in future in China.Results The Maxent model(AUC=0.95,maximum Kappa=0.91,maximum TSS=1.00)fit better than the other three models and was thus considered the best ENM for predicting Cryptosporidium habitat suitability.The major suitable habitats for human-derived Cryptosporidium in China were located in some high-population density areas,especially in the middle and lower reaches of the Yangtze River,the lower reaches of the Yellow River,and the Huai and the Pearl River Basins(cloglog value of habitat suitability>0.9).Under future climate change,non-suitable habitats for Cryptosporidium will shrink,while highly suitable habitats will expand significantly(χ^(2)=76.641,P<0.01;χ^(2)=86.836,P<0.01),and the main changes will likely be concentrated in the northeastern,southwestern,and northwestern regions.Conclusions The Maxent model is applicable in prediction of Cryptosporidium habitat suitability and can achieve excellent simulation results.These results suggest a current high risk of transmission and significant pressure for cryptosporidiosis prevention and control in China.Against a future climate change background,Cryptosporidium may gain more suitable habitats within China.Constructing a national surveillance network could facilitate further elucidation of the epidemiological trends and transmission patterns of cryptosporidiosis,and mitigate the associated epidemic and outbreak risks. 展开更多
关键词 CRYPTOSPORIDIUM CRYPTOSPORIDIOSIS ecological niche models Climate change One Health MAXENT
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Potential distributional shifts in North America of allelopathic invasive plant species under climate change models 被引量:3
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作者 Anson Wang Anthony E.Melton +1 位作者 Douglas ESoltis Pamela SSoltis 《Plant Diversity》 SCIE CAS CSCD 2022年第1期11-19,共9页
Predictive studies play a crucial role in the study of biological invasions of terrestrial plants under possible climate change scenarios.Invasive species are recognized for their ability to modify soil microbial comm... Predictive studies play a crucial role in the study of biological invasions of terrestrial plants under possible climate change scenarios.Invasive species are recognized for their ability to modify soil microbial communities and influence ecosystem dynamics.Here,we focused on six species of allelopathic flowering plants-Ailanthus altissima,Casuarina equisetifolia,Centaurea stoebe ssp.micranthos,Dioscorea bulbifera,Lantana camara,and Schinus terebinthifolia-Xhat are invasive in North America and examined their potential to spread further during projected climate change.We used Species Distribution Models(SDMs)to predict future suitable areas for these species in North America under several proposed future climate models.ENMEval and Maxent were used to develop SDMs,estimate current distributions,and predict future areas of suitable climate for each species.Areas with the greatest predicted suitable climate in the future include the northeastern and the coastal northwestern regions of North America.Range size estimations demonstrate the possibility of extreme range loss for these invasives in the southeastern United States,while new areas may become suitable in the northeastern United States and southeastern Canada.These findings show an overall northward shift of suitable climate during the next few decades,given projected changes in temperature and precipitation.Our results can be utilized to analyze potential shifts in the distribution of these invasive species and may aid in the development of conservation and management plans to target and control dissemination in areas at higher risk for potential future invasion by these allelopathic species. 展开更多
关键词 ALLELOPATHY Invasive species Species distribution models ecological niche models Invasion impacts Multi-species assessment
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Additions of landscape metrics improve predictions of occurrence of species distribution models 被引量:1
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作者 rica Hasui Vinícius X.Silva +6 位作者 Rogrio G.T.Cunha Flavio N.Ramos Milton C.Ribeiro Mario Sacramento Marco T.P.Coelho Diego G.S.Pereira Bruno R.Ribeiro 《Journal of Forestry Research》 SCIE CAS CSCD 2017年第5期963-974,共12页
Species distribution models are used to aid our understanding of the processes driving the spatial patterns of species’ habitats. This approach has received criticism, however, largely because it neglects landscape m... Species distribution models are used to aid our understanding of the processes driving the spatial patterns of species’ habitats. This approach has received criticism, however, largely because it neglects landscape metrics. We examined the relative impacts of landscape predictors on the accuracy of habitat models by constructing distribution models at regional scales incorporating environmental variables (climate, topography, vegetation, and soil types) and secondary species occurrence data, and using them to predict the occurrence of 36 species in 15 forest fragments where we conducted rapid surveys. We then selected six landscape predictors at the landscape scale and ran general linear models of species presence/absence with either a single scale predictor (the probabilities of occurrence of the distribution models or landscape variables) or multiple scale predictors (distribution models + one landscape variable). Our results indicated that distribution models alone had poor predictive abilities but were improved when landscape predictors were added; the species responses were not, however, similar to the multiple scale predictors. Our study thus highlights the importance of considering landscape metrics to generate more accurate habitat suitability models. 展开更多
关键词 ecological niche model Generalized linear models Habitat suitability Landscape structure MAXENT
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泛喜马拉雅区域藏原羚栖息地潜在分布、生态廊道及其影响因子 被引量:1
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作者 田炳辉 王金牛 +7 位作者 汪沐阳 石凝 罗栋梁 张林 朱牛 张宁 吴宁 盖艾鸿 《草业科学》 CAS CSCD 北大核心 2024年第8期1788-1801,共14页
藏原羚(Procapra picticaudata)作为青藏高原特有的有蹄类动物,明确其栖息地的潜在分布和影响因子有利于其种群的保护,进而缓解野生动物与人类活动的利益冲突,以期实现人与自然和谐共生。本研究在青藏高原、横断山区及东、中、西喜马拉... 藏原羚(Procapra picticaudata)作为青藏高原特有的有蹄类动物,明确其栖息地的潜在分布和影响因子有利于其种群的保护,进而缓解野生动物与人类活动的利益冲突,以期实现人与自然和谐共生。本研究在青藏高原、横断山区及东、中、西喜马拉雅等藏原羚分布整体范围内开展研究,并结合文献资料共收集藏原羚物种分布数据150个,利用MaxEnt模型和ArcGIS软件模拟预测藏原羚潜在栖息地,结合Linkage Mapper以生态源地计算潜在生态廊道。结果表明:1)当前气候情景下,藏原羚的适宜生境总面积为88.05万km^(2),占研究区总面积的23%。青藏高原适宜生境面积最大、横断山区次之,其余依次是西喜马拉雅、东喜马拉雅和中喜马拉雅。2)藏原羚的适宜生境主要分布于青藏高原中部、北部、南部和东北部,横断山区北部和喜马拉雅北部。三江源国家公园、羌塘国家级自然保护区、可可西里自然保护区、阿尔金山国家级自然保护区和色林错自然保护区是适宜生境最大保护区,其中有47.71%的适宜区位于保护区外。影响藏原羚分布的主要环境因子是年平均温度、坡度和海拔。3)识别出重要生态源地46个、共构建108条潜在生态廊道,平均长度为163.60 km。本研究从宏观尺度分析了藏原羚栖息地现状和生态廊道,有助于优化栖息地格局,促进种群迁徙扩散,对藏原羚种群的长期监测、管理和保护区规划提供了一定的理论指导意义。 展开更多
关键词 藏原羚 青藏高原 潜在栖息地 生态源地 生态位模型 相关性 阈值
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外来植物节节麦入侵过程中的生态位进化与入侵潜力研究
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作者 张春玲 杨毅哲 +8 位作者 陈丽丽 陈瑜 王佳 李欣迪 张献瑞 史岩 谢军 武艺凡 刘刚 《中国农学通报》 2024年第29期120-130,共11页
为了筑牢中国的生态安全屏障和保护生物多样性,防止节节麦大规模入侵和扩散带来的生态威胁,有必要采取综合防治措施并进行动态监测其入侵扩散趋势。基于节节麦在中国的预防和治理问题,本研究以节节麦为研究对象,利用最大熵(MaxEnt)模型... 为了筑牢中国的生态安全屏障和保护生物多样性,防止节节麦大规模入侵和扩散带来的生态威胁,有必要采取综合防治措施并进行动态监测其入侵扩散趋势。基于节节麦在中国的预防和治理问题,本研究以节节麦为研究对象,利用最大熵(MaxEnt)模型分析了其在中国的潜在适生区范围,并采用主成分分析方法分析了节节麦在入侵中国过程中的气候生态位变化。利用生态位模型对节节麦的现状和潜在分布进行了分析,确定了节节麦在中国入侵风险最高的地区,如中国中部、福建南部、广东湛江、海南、新疆西南和塔城地区、西藏西部和东南部地区。影响其分布的主要生态因子为最干月份降水量(Bio14)和最暖季度平均温度(Bio10)。较高的生态位稳定性表明节节麦在入侵过程中处于生态保守状态,节节麦在中国的气候生态位与本土生态位之间的差异是由于生态位未填充导致的,入侵种群的气候生态位只是本土生态位的一个子集。 展开更多
关键词 生态位模型 生态位漂移 生态位保守性 入侵物种 入侵阶段 节节麦 潜在适生区 入侵风险
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基于MaxEnt生态位模型的小花十万错在中国的潜在分布
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作者 李晓霞 胡宽义 +1 位作者 曾安逸 董定超 《西南农业学报》 CSCD 北大核心 2024年第4期860-868,共9页
[目的]探究气候因子、土壤因子对小花十万错分布的影响,为有效制定其管理措施提供依据。[方法]利用MaxEnt生态位模型对小花十万错在中国的潜在适生区进行预测。[结果]当年降水量在2000~3500 mm,年均气温25~26℃,年均温变化范围6~14℃时... [目的]探究气候因子、土壤因子对小花十万错分布的影响,为有效制定其管理措施提供依据。[方法]利用MaxEnt生态位模型对小花十万错在中国的潜在适生区进行预测。[结果]当年降水量在2000~3500 mm,年均气温25~26℃,年均温变化范围6~14℃时最适合小花十万错的生长,且最冷月最低温度处于20~30℃及最冷季平均温度在27℃左右时,小花十万错才能保持最大的生长效率,当最干月降水量在40 mm以上时才能保持存活,以上研究结果说明小花十万错具有喜温、畏寒、不抗旱的特点。在地理分布上,当前小花十万错仅在海南、台湾、广东三省有发现记录,但根据MaxEnt模型对当下气候的模拟分析,小花十万错在云南、广西、贵州、福建、江西、四川甚至西藏的某些地区具有适生区的存在,说明这些地区都存在被小花十万错生物入侵的危险。通过对未来气候的分析,可以得出小花十万错在我国境内的分布范围为扩张趋势,扩张的地区集中在云南、广西、广东、福建、海南等地。[结论]小花十万错的生长分布最易受年均温变化范围、年降水量、年平均气温、海拔等因素影响。当前,广东、广西、福建、云南、海南、台湾等省份均面临小花十万错的入侵风险,以台湾最严重,广东和海南次之,其余省份暂未发现该种的入侵记录。但从气候分析来看,存在小花十万错中、高适生区的云南、四川、广西等地仍然有被该种入侵的可能。因此,应根据防范区域的特点以及适生等级来制定区域性、重点性的防治计划,并在已被入侵的地区推广化学防治、生物防治等手段遏制小花十万错向邻近区域扩散,而在未被入侵的区域制定侧重于加强检疫、扩大检测的防治办法,预防小花十万错的跨区域传播。 展开更多
关键词 MaxEnt生态位模型 小花十万错 气候因子 土壤因子
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Elevation transition of aquatic insects closely matches a thermal feature in the Yungas of Northwestern Argentina
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作者 Alexandra BUITRAGO-GUACANAME Carlos MOLINERI +1 位作者 Andrés LIRA-NORIEGA Daniel Andrés DOS SANTOS 《Journal of Mountain Science》 SCIE CSCD 2024年第2期433-448,共16页
Temperature is a key factor that shapes the distribution of organisms.Having knowledge about how species respond to temperature is relevant to devise strategies for addressing the impacts of climate change.Aquatic ins... Temperature is a key factor that shapes the distribution of organisms.Having knowledge about how species respond to temperature is relevant to devise strategies for addressing the impacts of climate change.Aquatic insects are particularly vulnerable to climate change,yet there is still much to learn about their ecology and distribution.In the Yungas ecoregion of Northwestern Argentina,cold-and warm-adapted species of the orders Ephemeroptera,Plecoptera,and Trichoptera(EPT)are segregated by elevation.We modeled the ecological niche of South American EPT species in this region using available data and projected their potential distribution in geographic space.Species were grouped based on their ecogeographic similarity,and we analyzed their replacement pattern along elevation gradients,focusing on the ecotone where opposing thermal preferences converge.Along this interface,we identified critical points where the combined incidence of cold and warm assemblages maximizes,indicating a significant transition zone.We found that the Montane Cloud Forest holds the interface,with a particularly greater suitability at its lower boundary.The main axis of the interface runs in a N-S direction and falls between 14°C-16°C mean annual isotherms.The probability of a particular location within a basin being classified as part of the interface increases as Kira’s warmth index approaches a score around 150.Understanding the interface is critical for defining the thermal limits of species distribution and designing biomonitoring programs.Changes in the location of thermal constants related to mountainous ecotones may cause vertical displacement of aquatic insects and vegetation communities.We have recognized significant temperature thresholds that serve as indicators of suitability for the interface.As global warming is anticipated to shift these indicators,we suggest using them to monitor the imprints of climate change on mountain ecosystems. 展开更多
关键词 Austral Yungas ecological niche model EPHEMEROPTERA Kira’s warmth index PLECOPTERA TRICHOPTERA
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Projected impacts of climate change and anthropogenic effects on habitat distribution of endangered Javan Hawk-Eagle in Indonesia
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作者 Syartinilia Aryo Adhi Condro Satoshi Tsuyuki 《Geography and Sustainability》 CSCD 2024年第2期241-250,共10页
Changing climate will jeopardize biodiversity,particularly the geographic distribution of endemic species.One such species is the Javan Hawk-Eagle(JHE,Nisaetus bartelsi),a charismatic raptor found only on Java Island,... Changing climate will jeopardize biodiversity,particularly the geographic distribution of endemic species.One such species is the Javan Hawk-Eagle(JHE,Nisaetus bartelsi),a charismatic raptor found only on Java Island,Indonesia.Thus,it is crucial to develop an appropriate conservation strategy to preserve the species.Ecological niche modeling is considered a valuable tool for designing conservation plans for the JHE.We provide an ecological niche modeling approach and transfer its model to future climate scenarios for the JHE.We utilize various machine learning algorithms under sustainability and business-as-usual(BAU)scenarios for 2050.Additionally,we investigate the conservation vulnerability of the JHE,capturing multifaceted pressures on the species from climate dissimilarities and human disturbance variables.Our study reveals that the ensemble model performs exceptionally well,with temperature emerging as the most critical factor affecting the JHE distribution.This finding indicates that climate change will have a significant impact on the JHE species.Our results suggest that the JHE distribution will likely decrease by 28.41%and 40.16%from the current JHE distribution under sustainability and BAU scenarios,respectively.Furthermore,our study reveals high-potential refugia for future JHE,covering 7,596 km^(2)(61%)under the sustainability scenario and only 4,403 km^(2)(35%)under the BAU scenario.Therefore,effective management and planning,including habitat restoration,refugia preservation,habitat connectivity,and local community inclusivity,should be well-managed to achieve JHE conservation targets. 展开更多
关键词 Climate change ecological niche Ensemble model REFUGIA Javan Hawk-Eagle
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基于生态位模型的象耳豆根结线虫适生区预测研究
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作者 孟永攀 廖金铃 +1 位作者 赵晓艳 王菲菲 《绿色科技》 2024年第16期39-47,54,共10页
象耳豆根结线虫是一种具有强大致病力和巨大危害性的农作物病原物。为了准确预测象耳豆根结线虫在我国的潜在分布区,采用了5种生态位模型:最大熵模型(Maxent)、基于规则的遗传算法(GARP)、生态位因子分析模型(ENFA)、生物气候模型(Biocl... 象耳豆根结线虫是一种具有强大致病力和巨大危害性的农作物病原物。为了准确预测象耳豆根结线虫在我国的潜在分布区,采用了5种生态位模型:最大熵模型(Maxent)、基于规则的遗传算法(GARP)、生态位因子分析模型(ENFA)、生物气候模型(Bioclim)以及域模型(Domain),建立了针对该病原虫的潜在生境预测模型。通过运用受试者工作曲线(receiver operating characteristic,ROC)及Kappa值,对模型的预测精度进行了严谨检验,并从中筛选出了最优模型。结果表明:最大熵模型(Maxent)不仅具备出色的预测结果,而且运行性能卓越,因此被视为预测象耳豆根结线虫在我国潜在适生区的最理想模型。通过运用最优模型Maxent进行预测,发现象耳豆根结线虫在我国的适生区主要聚集在海南、广东、广西、福建等省份,同时江西、湖南等地区也包含其适生区。这些结果提供了宝贵的线索,强调了加强对象耳豆根结线虫的监测与预警工作的重要性。通过加强监测和预警工作,能够更好地防控象耳豆根结线虫的扩散与危害,保护我国的农业生产和植物生态安全。这一研究为农业生产者和植物保护工作者提供了有价值的参考,有助于采取针对性的措施来降低象耳豆根结线虫对农作物造成的潜在威胁。 展开更多
关键词 象耳豆根结线虫 适生区 生态位模型 MAXENT GARP ROC曲线
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气候变化下反枝苋潜在中国适生区及生态位研究
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作者 张鑫 张丹 +2 位作者 代鹏飞 张广森 宋玫 《草地学报》 CAS CSCD 北大核心 2024年第10期3280-3288,共9页
反枝苋(Amaranthus retroflexus)属高存活率入侵性植物,关注其在气候变化下的潜在分布格局和生态位变化,对当地作物生长和畜牧业健康发展具有重要意义。本研究基于观测点位和环境变量数据,使用最大熵(Maximum entropy,MaxEnt)模型和R语... 反枝苋(Amaranthus retroflexus)属高存活率入侵性植物,关注其在气候变化下的潜在分布格局和生态位变化,对当地作物生长和畜牧业健康发展具有重要意义。本研究基于观测点位和环境变量数据,使用最大熵(Maximum entropy,MaxEnt)模型和R语言ecospat包,对适生区潜在分布进行预测,并分析生态位。结果表明:海拔、年均温和年平均降水量是影响分布扩散的主要因子,累计贡献率达92%;在气候变化下,反枝苋的潜在分布区逐渐向我国的北部和西北部扩散,在2070年SSP585气候模式下扩散程度最大;随着气温升高,反枝苋逐渐向海拔较高、最暖月最高温度较低的地区分布扩散。在未来适宜生存的生态位重叠度将逐渐降低,并可能发生生态位变化。本研究将为气候变化下的反枝苋种群入侵提供保护政策和决策依据。 展开更多
关键词 反枝苋 生态位 空间格局 MaxEnt模型 气候变化
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