Seagrass bed ecosystem is a coastal ecosystem with abundant biodiversity and high production. It is also an important system for the sustainable development of human society and economy. Based on the local research, s...Seagrass bed ecosystem is a coastal ecosystem with abundant biodiversity and high production. It is also an important system for the sustainable development of human society and economy. Based on the local research, statistical data and prevenient research results, the main services of Hepu seagrass ecosystem were analyzed in the paper, including fishing production, nutrient cycling, scientific research, protecting the coast from eroding, climate regulation, biodiversity, culture, bequest valuation, option valuation and existence valuation and so on. At the same time, we used ecological and economic methods for economic evaluation of seagrass in Hepu of Guangxi, including the market valuation method, contingent valuation method, carbon and tax method, benefit transfer method and expert survey method. The results showed that the total valuation of the Hepu seagrass ecosystem service was about 6.29 × 10^5 Yuan RMB/ha in 2005. Among these services, the indirect using valuation is the main aspect, which was 4.47 x 10^5Yuan RMB/ha in 2005, accounting for 70.97 % of the total valuation. The non-using valuation was 1.54 × 10^5 Yuan RMB/ha in 2005, accounting for 24.52 % of the total valuation. The direct using valuation is the least, which was only 2.84 × 10^4 Yuan RMB/ha in 2005, accounting for 4.51% of the total valuation.展开更多
Seagrasses are one of the most productive ecosystems in coastal areas and support a wide variety of associated fauna. The tropical Indo-Pacific region is considered to have the highest diversity of seagrass plant spec...Seagrasses are one of the most productive ecosystems in coastal areas and support a wide variety of associated fauna. The tropical Indo-Pacific region is considered to have the highest diversity of seagrass plant species and the largest distribution areas of seagrass, yet the seagrass macrofauna in this region are poorly understood. To help fill this gap in our knowledge, an ecological survey was conducted to describe the abundance and diversity of benthic macrofauna from tropical seagrass beds and to determine between-station variations within a transect and between-site variations in macrofaunal abundance, taxa richness and community structure. Benthic macrofaunal samples associated with seagrass beds were collected with a core sampler on the east coast of North Sulawesi in May 2014 and on the west coast in October 2015. A total of 149 species from 14 higher taxa was collected. The most species-rich groups were polychaetes（56 species, 26% of total individual numbers）, decapods（20 species, 9% of total numbers） and amphipods（18 species, 35% of total numbers）. Between-station variations within a transect displayed different patterns between the east coast and the west coast. On the east coast, there were marked variations in abundance between stations within a transect for the macrofauna and amphipod assemblages. Both taxa richness and abundance varied with station for the macrofauna and polychaete assemblages on the west coast, resulting from the heterogeneity of the substrate along a transect. One-way ANOSIM together with MDS ordination indicated that macrofaunal community structure in seagrasses differed significantly between the east coast and the west coast, corresponding with the division of seagrasses into two broad categories of habitats, i.e.,mangrove-seagrass-reef continuum and seagrass-reef continuum. Compared with other studies in tropical areas,the abundance and diversity of benthic macrofauna in the present study were moderate. The reason for the two markedly distinct macrofaunal communities might be attributed to multiple factors, including sediment pattern,seagrass structure and temporal changes.展开更多
Based on macrobenthos collected from intertidal seagrass bed in Guangrao,Shandong Province in May 2013,the macrobenthic structure and diversity were analyzed.A total of 41 macrobenthic species were identified,among wh...Based on macrobenthos collected from intertidal seagrass bed in Guangrao,Shandong Province in May 2013,the macrobenthic structure and diversity were analyzed.A total of 41 macrobenthic species were identified,among which crustaceans were the most speciose macrobenthic taxa(16 species),followed by polychaetes(15 species)and mollusks(10 species).Seven dominant macrobenthic species were identified,including 3 species of polychaetes,2 species of crustaceans and 2 species of mollusks.The total abundance across the whole sampling area was 661.33 ind/m2.Total abundance and the abundance of Potamocorbula laevis and Heteromastus filiformis showed significant spatial variation,and the macrobenthic abundance distributed in seagrass meadows was higher than that in other areas.The results of cluster,nMDS ordination,SIMPER and IMS analyses all showed no linear correlation along the distance gradient from the seagrass meadow.Therefore,degraded seagrass can still provide detectable but limited ecological services.However,the rehabilitation of seagrass bed is essential and urgent to regain their full ecological function.展开更多
Posidonia oceanicameadows are experiencing a progressive decline, and monitoring their status is crucial for the maintenance of theseecosystems. We performed a comparativeanalysis of bed density, total phenol content ...Posidonia oceanicameadows are experiencing a progressive decline, and monitoring their status is crucial for the maintenance of theseecosystems. We performed a comparativeanalysis of bed density, total phenol content and protein expression pattern to assess the conservation status ofPosidoniaplants from the S. Marinella (Rome, Italy) meadow. The total phenol content was inversely related to maximum beddensity, confirming the relationship betweenhigh phenol content and stressful conditions. In addition, protein expression pattern profilesshowed that the number of differentially expressed proteins was dramatically reduced in the latest years compared to previous analyses. Our results support the usefulness of integrating solid descriptors, such as phenol content, with novel biochemical/molecular approaches in the monitoring of meadows.展开更多
通过开展曹妃甸海草床的分布、生物学特征、水环境和底质环境要素等调查研究工作,划定海草床分布区,对覆盖度进行分级,分析研究海草床生态特征及关键环境影响因子特征,为查明曹妃甸海草床资源环境家底、保护区划定、海洋生态修复及蓝碳...通过开展曹妃甸海草床的分布、生物学特征、水环境和底质环境要素等调查研究工作,划定海草床分布区,对覆盖度进行分级,分析研究海草床生态特征及关键环境影响因子特征,为查明曹妃甸海草床资源环境家底、保护区划定、海洋生态修复及蓝碳研究工作提供技术参考。结果显示,曹妃甸海草床主要优势种类为鳗草,平均株高75.00±6.15 cm/shoot,且不同站点之间有差异;总平均茎枝密度为261.26±48.50 shoots/m^(2),总平均地上和地下生物量分别为302.53±71.79 g DW/m^(2)和114.71±27.40 g DW/m^(2)。海草床分布区面积42.90 km^(2),其中密集区、较密集区、一般区、较稀疏区和稀疏区分别占比为13.09%、12.93%、18.82%、18.75%和36.40%,海草分布在北部和南部两个区域,其中密集区与较密集区多分布在北部区域;草床区和裸沙区水环境差异不明显,底质环境差异较大;水温、营养盐、透光度、水流及人类工程活动是影响曹妃甸海域海草生长的关键因素。展开更多
文摘Seagrass bed ecosystem is a coastal ecosystem with abundant biodiversity and high production. It is also an important system for the sustainable development of human society and economy. Based on the local research, statistical data and prevenient research results, the main services of Hepu seagrass ecosystem were analyzed in the paper, including fishing production, nutrient cycling, scientific research, protecting the coast from eroding, climate regulation, biodiversity, culture, bequest valuation, option valuation and existence valuation and so on. At the same time, we used ecological and economic methods for economic evaluation of seagrass in Hepu of Guangxi, including the market valuation method, contingent valuation method, carbon and tax method, benefit transfer method and expert survey method. The results showed that the total valuation of the Hepu seagrass ecosystem service was about 6.29 × 10^5 Yuan RMB/ha in 2005. Among these services, the indirect using valuation is the main aspect, which was 4.47 x 10^5Yuan RMB/ha in 2005, accounting for 70.97 % of the total valuation. The non-using valuation was 1.54 × 10^5 Yuan RMB/ha in 2005, accounting for 24.52 % of the total valuation. The direct using valuation is the least, which was only 2.84 × 10^4 Yuan RMB/ha in 2005, accounting for 4.51% of the total valuation.
基金China-Indonesia Maritime Cooperation Fund Project“China-Indonesia Bitung Joint Marine Ecological Station Establishment”the Scientific Research Foundation of Third Institute of Oceanography,SOA under contract No.2011034
文摘Seagrasses are one of the most productive ecosystems in coastal areas and support a wide variety of associated fauna. The tropical Indo-Pacific region is considered to have the highest diversity of seagrass plant species and the largest distribution areas of seagrass, yet the seagrass macrofauna in this region are poorly understood. To help fill this gap in our knowledge, an ecological survey was conducted to describe the abundance and diversity of benthic macrofauna from tropical seagrass beds and to determine between-station variations within a transect and between-site variations in macrofaunal abundance, taxa richness and community structure. Benthic macrofaunal samples associated with seagrass beds were collected with a core sampler on the east coast of North Sulawesi in May 2014 and on the west coast in October 2015. A total of 149 species from 14 higher taxa was collected. The most species-rich groups were polychaetes（56 species, 26% of total individual numbers）, decapods（20 species, 9% of total numbers） and amphipods（18 species, 35% of total numbers）. Between-station variations within a transect displayed different patterns between the east coast and the west coast. On the east coast, there were marked variations in abundance between stations within a transect for the macrofauna and amphipod assemblages. Both taxa richness and abundance varied with station for the macrofauna and polychaete assemblages on the west coast, resulting from the heterogeneity of the substrate along a transect. One-way ANOSIM together with MDS ordination indicated that macrofaunal community structure in seagrasses differed significantly between the east coast and the west coast, corresponding with the division of seagrasses into two broad categories of habitats, i.e.,mangrove-seagrass-reef continuum and seagrass-reef continuum. Compared with other studies in tropical areas,the abundance and diversity of benthic macrofauna in the present study were moderate. The reason for the two markedly distinct macrofaunal communities might be attributed to multiple factors, including sediment pattern,seagrass structure and temporal changes.
基金This study was funded by the National Natural Science Foundation of China(No.42076156,41676139).
文摘Based on macrobenthos collected from intertidal seagrass bed in Guangrao,Shandong Province in May 2013,the macrobenthic structure and diversity were analyzed.A total of 41 macrobenthic species were identified,among which crustaceans were the most speciose macrobenthic taxa(16 species),followed by polychaetes(15 species)and mollusks(10 species).Seven dominant macrobenthic species were identified,including 3 species of polychaetes,2 species of crustaceans and 2 species of mollusks.The total abundance across the whole sampling area was 661.33 ind/m2.Total abundance and the abundance of Potamocorbula laevis and Heteromastus filiformis showed significant spatial variation,and the macrobenthic abundance distributed in seagrass meadows was higher than that in other areas.The results of cluster,nMDS ordination,SIMPER and IMS analyses all showed no linear correlation along the distance gradient from the seagrass meadow.Therefore,degraded seagrass can still provide detectable but limited ecological services.However,the rehabilitation of seagrass bed is essential and urgent to regain their full ecological function.
文摘Posidonia oceanicameadows are experiencing a progressive decline, and monitoring their status is crucial for the maintenance of theseecosystems. We performed a comparativeanalysis of bed density, total phenol content and protein expression pattern to assess the conservation status ofPosidoniaplants from the S. Marinella (Rome, Italy) meadow. The total phenol content was inversely related to maximum beddensity, confirming the relationship betweenhigh phenol content and stressful conditions. In addition, protein expression pattern profilesshowed that the number of differentially expressed proteins was dramatically reduced in the latest years compared to previous analyses. Our results support the usefulness of integrating solid descriptors, such as phenol content, with novel biochemical/molecular approaches in the monitoring of meadows.
文摘通过开展曹妃甸海草床的分布、生物学特征、水环境和底质环境要素等调查研究工作,划定海草床分布区,对覆盖度进行分级,分析研究海草床生态特征及关键环境影响因子特征,为查明曹妃甸海草床资源环境家底、保护区划定、海洋生态修复及蓝碳研究工作提供技术参考。结果显示,曹妃甸海草床主要优势种类为鳗草,平均株高75.00±6.15 cm/shoot,且不同站点之间有差异;总平均茎枝密度为261.26±48.50 shoots/m^(2),总平均地上和地下生物量分别为302.53±71.79 g DW/m^(2)和114.71±27.40 g DW/m^(2)。海草床分布区面积42.90 km^(2),其中密集区、较密集区、一般区、较稀疏区和稀疏区分别占比为13.09%、12.93%、18.82%、18.75%和36.40%,海草分布在北部和南部两个区域,其中密集区与较密集区多分布在北部区域;草床区和裸沙区水环境差异不明显,底质环境差异较大;水温、营养盐、透光度、水流及人类工程活动是影响曹妃甸海域海草生长的关键因素。
