Contrasting energy pathways at the community level as a consequence of regime shifts.
Contrasting energy pathways at the community level as a consequence of regime shifts.
复制标题
政权更迭导致社区层面的能源路径对比
DOI：
10.1007/s00442-013-2878-2
复制
发表时间：
2014-05
期刊：
影响因子：
2.7
通讯作者：
Xie, Ping
中科院分区：
文献类型：
--
作者：
Xu, Jun;Wen, Zhourui;Ke, Zhixin;Zhang, Meng;Zhang, Min;Guo, Nichun;Hansson, Lars-Anders;Xie, Ping
生态制度变迁通常会导致生态系统结构的突变，通过几个营养级，这导致快速的生态系统之间的制度重构。一个有趣的方面的影响政权转变是，替代制度可能会导致不同的转变，能源途径，这些都没有经过测试的结构变化。本文通过使用稳定同位素来建立鱼类群落中的能量途径来解决这个问题。我们特别关注政权转移对能源途径变化的影响，以及这些变化的幅度和方向如何影响当地社区。我们发现，由于不同的制度，食浮游生物、食底生物和食鱼营养行会之间的能量途径显着不同。从一个明确的制度转变为浑浊的状态改变了食物网的能量途径和截断的食物链长度，这是生态效率较低的指标。当前社区中普遍存在的杂食动物的适应性觅食策略证实了这一点。营养相互作用的这些结构和功能特征可能不会在这种浑浊状态下促进经典的营养级联效应，并抑制系统对环境变化的响应，例如，营养负荷和恢复努力在混浊到清澈的水制度转变。
Ecological regime shifts typically result in abrupt changes in ecosystem structure through several trophic levels, which leads to rapid ecosystem reconfiguration between regimes. An interesting aspect of the impact of regime shift is that alternative regimes may induce distinct shifts in energy pathways; these have been less tested than structural changes. This paper addresses this by using stable isotopes to establish the energy pathways in fish communities. We specifically focus on the impact of regime shift on changes of the energy pathways, and how the magnitude and direction of these changes affect the local community. We found that energy pathways significantly varied among the planktivorous, benthivorous, and piscivorous trophic guilds as a result of the alternative regimes. The regime shift from a clear to a turbid state altered the food web towards planktonic energy pathways and truncated food chain length, which is indicative of less ecological efficiency. This was confirmed by the adaptive foraging strategies of prevalent omnivores in the current communities. These structural and functional characteristics of trophic interactions might not facilitate classic trophic cascading effects in such a turbid regime and suppress the system’s response to environmental changes, e.g., nutrient loading, and restoration efforts in turbid to clear water regime shifts.
登录
查看更多内容
影响因子：
2.6
作者：
Jeppesen, Erik;Sondergaard, Martin;Jensen, Jens Peder
通讯作者：
Jensen, Jens Peder
影响因子：
3.5
作者：
Qin, Boqiang;Zhu, Guangwei;Carmichael, Wayne W.
通讯作者：
Carmichael, Wayne W.
影响因子：
2.6
作者：
Qin, Boqiang;Xu, Pengzhu;Zhang, Yunlin
通讯作者：
Zhang, Yunlin
DOI：
10.1127/0003-9136/2004/0161-0433
发表时间：
2004-12-01
期刊：
ARCHIV FUR HYDROBIOLOGIE
影响因子：
--
作者：
Hargeby, A;Blindow, I;Hansson, LA
通讯作者：
Hansson, LA
影响因子：
4.5
作者：
Gu, Binhe;Chapman, Andrew D.;Schelske, Claire L.
通讯作者：
Schelske, Claire L.