10400308 results
Contributors: Joshua Jones
Date: 2019-04-16
... Artificial barriers are one of the main threats to river ecosystems, resulting in habitat fragmentation and loss of connectivity. Yet, the abundance and distribution of most artificial barriers, excluding high head dams, is poorly documented. We provide a global assessment of the distribution and typology of artificial barriers in Great Britain, and estimate for the first time the extent of river fragmentation. To this end, barrier data were compiled from existing databases and were ground truthed by field surveys in England, Scotland and Wales to derive a correction factor for barrier density across Great Britain. Field surveys indicate that existing barrier databases underestimate barrier density by 68%, particularly in the case of low-head structures (<1 m) which are often missing from current records. Field-corrected barrier density estimates ranged from 0.48 barriers/km in Scotland to 0.63 barriers/km in Wales, and 0.75 barriers/km in England. Corresponding estimates of stream fragmentation, measured as mean barrier-free length, were 12.30 km in Scotland, 6.68 km in Wales and 5.29 km in England, reflecting different anthropogenic pressures. Our study indicates that 97% of the river network in Great Britain is fragmented and none of the rivers are free of artificial barriers.
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Contributors: Kunlei Liu, Rachael Kelsey, Leland Widger, Chad Risko, Sean Parkin, Cameron Lippert, Moushumi Sarma
Date: 2019-04-16
... check CIF files for reported complexes
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Contributors: Yong He
Date: 2019-04-16
... This is the constitute strain-stress curve for the elastoplastic behavior under the cyclic unloading condition.
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Contributors: Jie Yang
Date: 2019-04-16
... Crystallization behaviors of CaO-SiO2 based slag for high Mn-high Al steels
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Contributors: Zhiwen Qi, Fan Mo, Teng Zhou, XinXin Li, Lifang Chen, He Chao, Hongye Cheng, ZHEN SONG
Date: 2019-04-16
... supplementary material
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Contributors: UnaElsLive Natra
Date: 2019-04-16
... SMOKE TEST - second
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Contributors: Tibor Tauzin
Date: 2019-04-16
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Contributors: Ben Shelton, Keith Nesbitt
Date: 2019-04-16
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Contributors: Nicholas Murphy, Daniel Owens, Niles Nelson, Emily Hinds
Date: 2019-04-16
... blastic plasmacytoid dendritic cell neoplasm
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Contributors: Seiji OHSHIMO, Taketoshi Kodama, Satoshi Suyama, Daniel Madigan, Takashi Yamakawa, Kaoru Komoto, Hiroshige Tanaka, Tsuneo Ono
Date: 2019-04-16
... Appendix Collection year, month, positions, genus, species, body mass, δ13C, δ15N, organisms and vertical habitat in the North western Pacific for estimating the isoscapes.
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