Terrestrial carbon is a resource, but not a subsidy, for lake zooplankton.
Terrestrial carbon is a resource, but not a subsidy, for lake zooplankton.
复制标题
对于湖泊浮游动物来说，陆地碳是一种资源，但不是补贴。
DOI：
10.1890/13-1586.1
复制
发表时间：
2014
期刊：
影响因子：
4.8
通讯作者：
Stuart E. Jones
中科院分区：
文献类型：
--
作者：
P. Kelly;C. Solomon;B. Weidel;Stuart E. Jones
陆地有机碳（t-OC）输入湖泊通常被认为是对水生消费生产的资源补贴。虽然有证据表明陆地碳可以被纳入水生消费者的组织，但其提高消费者生产的能力一直存在争议。本研究旨在评估t-OC输入对浮游动物的净效应。为了解决这些问题，我们对10个湖泊浮游动物的生产和资源利用进行了调查，这些湖泊沿着自然发生的t-OC浓度梯度进行了调查。总浮游动物产量和特定种群浮游动物产量与t-OC呈负相关。浮游动物产量的剩余变化与浮游动物对陆地资源的利用（异栖）呈负相关，但不能用t-OC来解释。这些结果对陆地碳作为资源补贴的说法提出了挑战；相反，光穿透减少对适宜生境数量的负面影响和t-OC资源质量的降低似乎减少了浮游动物的产量。我们的研究结果表明，湖泊中t-OC浓度在大陆范围内的持续增加可能会对水生食物网的生产力产生负面影响。
Inputs of terrestrial organic carbon (t-OC) into lakes are often considered a resource subsidy for aquatic consumer production. Although there is evidence that terrestrial carbon can be incorporated into the tissues of aquatic consumers, its ability to enhance consumer production has been debated. Our research aims to evaluate the net effect of t-OC input on zooplankton. We used a survey of zooplankton production and resource use in ten lakes along a naturally occurring gradient of t-OC concentration to address these questions. Total and group-specific zooplankton production was negatively related to t-OC. Residual variation in zooplankton production that was not explained by t-OC was negatively related to terrestrial resource use (allochthony) by zooplankton. These results challenge the designation of terrestrial carbon as a resource subsidy; rather, the negative effect of reduced light penetration on the amount of suitable habitat and the low resource quality of t-OC appear to diminish zooplankton production. Our findings suggest that ongoing continental-scale increases in t-OC concentrations of lakes will likely have negative impacts on the productivity of aquatic food webs.
影响因子：
9.8
作者：
Clark, J. M.;Bottrell, S. H.;Chapman, P. J.
通讯作者：
Chapman, P. J.