A new species of bubblegum coral, Paragorgia rubra sp. nov., discovered from a seamount at a water depth of 373 m near the Yap Trench is studied using morphological and molecular approaches. Paragorgia rubra sp. nov. ...A new species of bubblegum coral, Paragorgia rubra sp. nov., discovered from a seamount at a water depth of 373 m near the Yap Trench is studied using morphological and molecular approaches. Paragorgia rubra sp. nov. is the fourth species of the genus found in the tropical Western Pacific. The new gorgonian is red-colored, uniplanar, and measures approximately 530 mm high and 440 mm wide, with autozooids distributed only on one side of the colony. Paragorgia rubra sp. nov. is most similar to P. kaupeka Sainchez, 2005, but differs distinctly in the polyp ovals with large and compound protuberances （vs. small and simple conical protuberances） and the medullar spindles possessing simple conical protuberances （vs. compound protuberances）. Moreover, P. rubra sp. nov. differs from P. kaupeka in the smaller length/ width ratio of surface radiates （1.53 vs. 1.75 ）. The genetic distance of the mtMutS gene between P. rubra sp. nov. and P. kaupeka is 0.66%, while the intraspecific distances within Paragorgia Milne-Edwards ＆ Haime, 1857 except the species P. regalis complex are no more than 0.5%, further supporting the establishment of the new species. Furthermore, the ITS2 secondary structure ofP. rubra sp. nov. is also different from those of congeners. Phylogenetic analyses indicate Paragorgia rubra sp. nov. and P. kaupeka form a clade, which branched early within Paragorgia and diversified approximately 15 Mya.展开更多
The main morphological characteristics, producing area and growth characteristics of sixteen new varieties of Chinese white poplar （Populus tomentosa Carr. ） are reported, aiming at providing reference for breeding ...The main morphological characteristics, producing area and growth characteristics of sixteen new varieties of Chinese white poplar （Populus tomentosa Carr. ） are reported, aiming at providing reference for breeding and extension of new varieties.展开更多
Three new species from Tibet are described: Amphinemura yangi, A. l ii and A. tibetensis. Their relationships with the relative species are di scus sed. A key to the species of the genus Amphinemura from Tibet is pres...Three new species from Tibet are described: Amphinemura yangi, A. l ii and A. tibetensis. Their relationships with the relative species are di scus sed. A key to the species of the genus Amphinemura from Tibet is presented. The types are deposited in the Insect Collection of China Agricultural Universit y.展开更多
Aims Determining the ecological consequences of interactions between slow changes in long-term climate means and amplified variability in climate is an important research frontier in plant ecology.We combined the rece...Aims Determining the ecological consequences of interactions between slow changes in long-term climate means and amplified variability in climate is an important research frontier in plant ecology.We combined the recent approach of climate sensitivity functions with a revised hydrological‘bucket model’to improve predictions on how plant species will respond to changes in the mean and variance of groundwater resources.Methods We leveraged spatiotemporal variation in long-term datasets of riparian vegetation cover and groundwater levels to build the first groundwater sensitivity functions for common plant species of dryland riparian corridors.Our results demonstrate the value of this approach to identifying which plant species will thrive(or fail)in an increasingly variable climate layered with declining groundwater stores.Important Findings Riparian plant species differed in sensitivity to both the mean and variance in groundwater levels.Rio Grande cottonwood(Populus deltoides ssp.wislizenii)cover was predicted to decline with greater inter-annual groundwater variance,while coyote willow(Salix exigua)and other native wetland species were predicted to benefit from greater year-to-year variance.No non-native species were sensitive to groundwater variance,but patterns for Russian olive(Elaeagnus angustifolia)predict declines under deeper mean groundwater tables.Warm air temperatures modulated groundwater sensitivity for cottonwood,which was more sensitive to variability in groundwater in years/sites with warmer maximum temperatures than in cool sites/periods.Cottonwood cover declined most with greater intra-annual coefficients of variation(CV)in groundwater,but was not significantly correlated with inter-annual CV,perhaps due to the short time series(16 years)relative to cottonwood lifespan.In contrast,non-native tamarisk(Tamarix chinensis)cover increased with both intra-and inter-annual CV in groundwater.Altogether,our results predict that changes in groundwater variability and mean will affect riparian plant communities through the differential sensitivities of individual plant species to mean versus variance in groundwater stores.展开更多
基金Supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA11030201)the National Natural Science Foundation of China(No.41406162)the CAS/SAFEA International Partnership Program for Creative Research Teams(No.20140491526)
文摘A new species of bubblegum coral, Paragorgia rubra sp. nov., discovered from a seamount at a water depth of 373 m near the Yap Trench is studied using morphological and molecular approaches. Paragorgia rubra sp. nov. is the fourth species of the genus found in the tropical Western Pacific. The new gorgonian is red-colored, uniplanar, and measures approximately 530 mm high and 440 mm wide, with autozooids distributed only on one side of the colony. Paragorgia rubra sp. nov. is most similar to P. kaupeka Sainchez, 2005, but differs distinctly in the polyp ovals with large and compound protuberances （vs. small and simple conical protuberances） and the medullar spindles possessing simple conical protuberances （vs. compound protuberances）. Moreover, P. rubra sp. nov. differs from P. kaupeka in the smaller length/ width ratio of surface radiates （1.53 vs. 1.75 ）. The genetic distance of the mtMutS gene between P. rubra sp. nov. and P. kaupeka is 0.66%, while the intraspecific distances within Paragorgia Milne-Edwards ＆ Haime, 1857 except the species P. regalis complex are no more than 0.5%, further supporting the establishment of the new species. Furthermore, the ITS2 secondary structure ofP. rubra sp. nov. is also different from those of congeners. Phylogenetic analyses indicate Paragorgia rubra sp. nov. and P. kaupeka form a clade, which branched early within Paragorgia and diversified approximately 15 Mya.
基金Henan Provincial Science and Technology Key Project (024050019)~~
文摘The main morphological characteristics, producing area and growth characteristics of sixteen new varieties of Chinese white poplar （Populus tomentosa Carr. ） are reported, aiming at providing reference for breeding and extension of new varieties.
文摘Three new species from Tibet are described: Amphinemura yangi, A. l ii and A. tibetensis. Their relationships with the relative species are di scus sed. A key to the species of the genus Amphinemura from Tibet is presented. The types are deposited in the Insect Collection of China Agricultural Universit y.
基金supported by grants from the National Science Foundation to the University of New Mexico(UNM)for Long-term Ecological Research,most recently DEB#1655499 and by the UNM Department of Biology.
文摘Aims Determining the ecological consequences of interactions between slow changes in long-term climate means and amplified variability in climate is an important research frontier in plant ecology.We combined the recent approach of climate sensitivity functions with a revised hydrological‘bucket model’to improve predictions on how plant species will respond to changes in the mean and variance of groundwater resources.Methods We leveraged spatiotemporal variation in long-term datasets of riparian vegetation cover and groundwater levels to build the first groundwater sensitivity functions for common plant species of dryland riparian corridors.Our results demonstrate the value of this approach to identifying which plant species will thrive(or fail)in an increasingly variable climate layered with declining groundwater stores.Important Findings Riparian plant species differed in sensitivity to both the mean and variance in groundwater levels.Rio Grande cottonwood(Populus deltoides ssp.wislizenii)cover was predicted to decline with greater inter-annual groundwater variance,while coyote willow(Salix exigua)and other native wetland species were predicted to benefit from greater year-to-year variance.No non-native species were sensitive to groundwater variance,but patterns for Russian olive(Elaeagnus angustifolia)predict declines under deeper mean groundwater tables.Warm air temperatures modulated groundwater sensitivity for cottonwood,which was more sensitive to variability in groundwater in years/sites with warmer maximum temperatures than in cool sites/periods.Cottonwood cover declined most with greater intra-annual coefficients of variation(CV)in groundwater,but was not significantly correlated with inter-annual CV,perhaps due to the short time series(16 years)relative to cottonwood lifespan.In contrast,non-native tamarisk(Tamarix chinensis)cover increased with both intra-and inter-annual CV in groundwater.Altogether,our results predict that changes in groundwater variability and mean will affect riparian plant communities through the differential sensitivities of individual plant species to mean versus variance in groundwater stores.
