The contribution of autochthonous resource to the diet of aquatic consumers is unrelated to its spatial distribution in tank bromeliads
The contribution of autochthonous resource to the diet of aquatic consumers is unrelated to its spatial distribution in tank bromeliads
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原生资源对水生消费者饮食的贡献与其在罐中凤梨科植物中的空间分布无关
DOI：
10.1086/718630
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发表时间：
2022
影响因子：
1.8
通讯作者：
Farjalla, Vinicius F.
中科院分区：
文献类型：
--
作者：
Leal, Juliana S.;González, Angélica L.;Paulo, Rhuana C.;Farjalla, Vinicius F.
土著生物量在淡水生态系统中分布不均匀，塑造了群落结构和生态系统功能，但很少有研究评估了土著资源的空间异质性如何影响其对水生消费者饮食的贡献。为了填补这一空白，我们进行了实地调查，以测试是否在淡水生态系统内形成的本地资源的空间异质性池凤梨决定其贡献的饮食的水生消费者。罐凤梨是新热带植物，具有密集排列的莲座状叶子，可以积聚雨水和陆地植物物质，为各种水生无脊椎动物提供合适的栖息地。我们对凤梨生态系统的3个区域（北部、中部和南部）进行了采样，以提供本地资源可用性的自然梯度（即，藻类生物质）。为了追踪水产消费者的饮食，我们使用了氢的稳定同位素分析和贝叶斯稳定同位素混合模型。本地资源的可用性不同的坦克凤梨地区与光的可用性，但它是不相关的相对贡献的饮食的水生消费者。相反，来自所有地区的水生消费者表现出类似的高程度的autochthony。水生消费者在植物内移动的能力并不影响本地资源对他们饮食的贡献。我们的理由是，本地资源的消费者的饮食的贡献是不相关的空间分布，因为水生消费者优先喂养这种资源，即使它的股票是有限的。此外，水箱之间的水流可以将本地资源从生产力较高的地区补贴到生产力较低的地区。我们的结论是，空间异质性的本地资源的可用性并不限制其对水生消费者的饮食的贡献，因为积极觅食的本地资源和淡水缸凤梨生态系统的隔间之间的这种资源的流量。
Autochthonous biomass is heterogeneously distributed within freshwater ecosystems, shaping community structure and ecosystem functioning, yet few studies have evaluated how the spatial heterogeneity in the availability of the autochthonous resource affects its contribution to the diets of aquatic consumers. To fill this gap, we conducted a field survey to test whether the spatial heterogeneity of the autochthonous resource within freshwater ecosystems formed in tank bromeliads determines its contribution to the diet of aquatic consumers. Tank bromeliads are Neotropical plants with densely arranged leaves in a rosette shape that accumulate rainwater and terrestrial plant material, providing suitable habitat for a diversity of aquatic invertebrates. We sampled 3 regions (north, central, and south) of the bromeliad ecosystem to provide a natural gradient in the availability of the autochthonous resource (i.e., algae biomass). To trace the diets of aquatic consumers, we used stable isotope analysis of hydrogen coupled with Bayesian stable isotope mixing models. The availability of the autochthonous resource varied among the tank-bromeliad regions with light availability, but it was not related to its relative contribution to the diets of aquatic consumers. Instead, aquatic consumers from all regions showed similarly high degrees of autochthony. The capacity of aquatic consumers to move within the plant did not affect the contribution of the autochthonous resource to their diets. We reason that the contribution of the autochthonous resource to the diets of consumers is not related to its spatial distribution because aquatic consumers preferentially feed on this resource, even when its stocks are limited. In addition, water flow among tanks could provide a subsidy of the autochthonous resource from more productive to less productive regions. We conclude that spatial heterogeneity in the availability of the autochthonous resource does not limit its contribution to the diet of aquatic consumers because of active foraging on the autochthonous resource and the flux of this resource among compartments in freshwater tank-bromeliad ecosystems.
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影响因子：
2.6
作者：
Marino, Nicholas A. C.;Guariento, Rafael D.;Farjalla, Vinicius F.
通讯作者：
Farjalla, Vinicius F.
影响因子：
4.8
作者：
Brett, Michael T.;Holtgrieve, Gordon W.;Schindler, Daniel E.
通讯作者：
Schindler, Daniel E.
湖泊的新问题——不易降解有机物。
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
S.;Inoue;Y.;Oshima;H.;Usuki;M.;Hamaguchi;Y.;Hanamura;N.;Kai;Y.;Shimasaki;T.;Honjo;Imai A.
通讯作者：
Imai A.
影响因子：
1.6
作者：
Maki, Koh;Kim, Chulgoo;Nagata, Toshi
通讯作者：
Nagata, Toshi