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排序方式: 共有203条查询结果,搜索用时 406 毫秒
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Annelieke Hijkoop Chiara C.M.M. Lap Moska Aliasi Eduard J.H. Mulder William L.M. Kramer Hens A.A. Brouwers Robertine van Baren Eva Pajkrt Anton H. van Kaam Caterina M. Bilardo Lourens R. Pistorius Gerard H.A. Visser René M.H. Wijnen Dick Tibboel Gwendolyn T.R. Manten Titia E. Cohen-Overbeek 《黑龙江环境通报》2019,39(13):1204-1212
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In this study, we examined the differential thermal tolerance of Strongylocentrotus purpuratus early life history stages by comparing high temperature–induced mortality and the relative levels of the stress-induced gene,
hsp70, between S. purpuratus embryos and larvae from adults collected throughout the species range. There was no significant difference between gastrulae
and 4-arm plutei mortality from all sites examined. Furthermore, there was little variability in temperature tolerance across
the biogeographic range as southern gastrulae and 4-arm plutei exhibited similar tolerances to northern individuals. Relative
levels of hsp70 mRNA expression did not differ overall between the two developmental stages at each site. Across sites, all gastrulae and
4-arm plutei exhibited maximum hsp70 expression at approximately 25°C; however, the range of hsp70 expression was narrower in southern individuals, suggesting they are living closer to their upper thermal limit than northern
individuals. 相似文献
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Eileen E. Hofmann Leonard J. Pietrafesa John M. Klinck Larry P. Atkinson 《Ecological modelling》1980,10(3-4)
A time dependent, vertical plane mathematical model of nitrate distribution in Onslow Bay, North Carolina, is developed using similarity theory and conventional numerical techniques. Inputs of nitrate into Onslow Bay are the result of Gulf Stream intrusions (Atkinson et al., 1980) and this forcing is included as a boundary condition for this system. Advective and diffusive processes provide the mechanisms for transport of nitrate in Onslow Bay. The time dependence of the resulting nitrate fields is determined by the rate of phytoplankton removal of nitrate.Nondimensional numbers, arising from model formulation, indicate the relative importance of various processes included in the model. Two nondimensional numbers, H and P, and the nondimensional ratio, P/H, indicate interactions of physical processes. Importance of the biological terms is determined by a third nondimensional number, A. Model results are compared to nitrate data collected in Onslow Bay, North Carolina during an intrusion. 相似文献
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