Estimating species distribution and abundance in river networks using environmental DNA.
Estimating species distribution and abundance in river networks using environmental DNA.
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DOI：
10.1073/pnas.1813843115
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发表时间：
2018-11-13
影响因子：
11.1
通讯作者：
Rinaldo A
中科院分区：
文献类型：
--
作者：
Carraro L;Hartikainen H;Jokela J;Bertuzzo E;Rinaldo A
生物体在其环境中留下DNA痕迹[环境DNA（eDNA）]，例如粘液或粪便中的细胞。当从水或土壤中提取时，eDNA可用于跟踪目标物种的存在或整个群落的组成。在河流中，eDNA动力学受到运输和衰变的调制。在这里，我们使用基于水文的模型来重建整个河流网络中目标物种的上游分布和丰度。我们验证我们的方法，估计全流域的生物量分布的固着无脊椎动物及其寄生虫，引起疾病的鲑鱼。这项工作释放了eDNA的力量，以传统调查方法迄今为止不可行的方式监测广泛的地理区域的生物多样性。所有生物都会在其环境中留下DNA的痕迹。这种环境DNA（eDNA）通常用于跟踪目标物种的发生模式。在河流中的应用尤其有希望，因为eDNA可以整合上游种群的信息。通过树枝状的河流网络的运输和衰变的复杂过程调制的eDNA在河流中的分散，我们目前缺乏一种方法来提取的位置和密度的人口的定量信息，有助于eDNA信号。在这里，我们提出了一个总体框架，以重建上游分布和丰富的目标物种跨越河流网络，根据观察到的eDNA浓度和水文地貌特征的网络。该模型捕捉到两个目标物种的全流域的空间生物量分布：固着无脊椎动物（苔藓虫Fredericella sultana）和寄生虫（粘虫Tetracapsuloides bryosalmonae）。我们的方法的目的是很容易地整合一般的生物和水文数据，并使空间上明确的估计，固着和移动的物种在河流生态系统的基础上eDNA采样的分布。
Organisms leave traces of DNA in their environment [environmental DNA (eDNA)], such as cells in mucus or feces. When extracted from water or soil, eDNA can be used to track the presence of a target species or the composition of entire communities. In rivers, eDNA dynamics are modulated by transport and decay. Here, we use hydrologically based models to reconstruct the upstream distribution and abundance of target species throughout a river network from eDNA measurements. We validate our method by estimating the catchment-wide biomass distribution of a sessile invertebrate and its parasite, causing disease in salmonids. This work unlocks the power of eDNA for monitoring biodiversity across broad geographies in a way hitherto unfeasible with traditional survey approaches. All organisms leave traces of DNA in their environment. This environmental DNA (eDNA) is often used to track occurrence patterns of target species. Applications are especially promising in rivers, where eDNA can integrate information about populations upstream. The dispersion of eDNA in rivers is modulated by complex processes of transport and decay through the dendritic river network, and we currently lack a method to extract quantitative information about the location and density of populations contributing to the eDNA signal. Here, we present a general framework to reconstruct the upstream distribution and abundance of a target species across a river network, based on observed eDNA concentrations and hydro-geomorphological features of the network. The model captures well the catchment-wide spatial biomass distribution of two target species: a sessile invertebrate (the bryozoan Fredericella sultana) and its parasite (the myxozoan Tetracapsuloides bryosalmonae). Our method is designed to easily integrate general biological and hydrological data and to enable spatially explicit estimates of the distribution of sessile and mobile species in fluvial ecosystems based on eDNA sampling.
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DOI：
10.1890/14-1530.1
发表时间：
2015-06
期刊：
Ecological applications : a publication of the Ecological Society of America
影响因子：
--
作者：
Huver JR;Koprivnikar J;Johnson PT;Whyard S
通讯作者：
Whyard S
影响因子：
5.7
作者：
Dejean, Tony;Valentini, Alice;Miaud, Claude
通讯作者：
Miaud, Claude
影响因子：
2.7
作者：
Carraro, Luca;Mari, Lorenzo;Bertuzzo, Enrico
通讯作者：
Bertuzzo, Enrico
影响因子：
11.4
作者：
Jerde, Christopher L.;Olds, Brett P.;Tank, Jennifer L.
通讯作者：
Tank, Jennifer L.
影响因子：
2.4
作者：
Roberts, Gareth O.;Rosenthal, Jeffrey S.
通讯作者：
Rosenthal, Jeffrey S.