Large-scale climatic phenomena drive fluctuations in macroinvertebrate assemblages in lowland tropical streams, Costa Rica: The importance of ENSO events in determining long-term (15y) patterns.
Large-scale climatic phenomena drive fluctuations in macroinvertebrate assemblages in lowland tropical streams, Costa Rica: The importance of ENSO events in determining long-term (15y) patterns.
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DOI：
10.1371/journal.pone.0191781
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发表时间：
2018
期刊：
影响因子：
3.7
通讯作者：
Pringle CM
中科院分区：
文献类型：
--
作者：
Gutiérrez-Fonseca PE;Ramírez A;Pringle CM
了解环境变量如何在相对较长的时间尺度上影响生物体的分布和密度是生态学中的一个核心问题，因为气候变异性增加（例如，降水、ENSO事件）。我们的研究的主要目标是评估长期（15年的时间跨度）的气候模式，以及在低地哥斯达黎加的两个新热带流的环境参数，以评估对水生大型无脊椎动物的潜在影响。我们还研究了8年的全流磷富集实验对大型无脊椎动物组合的长期研究的背景下的相对影响。气候，环境变量和大型无脊椎动物样本每月测量7年，然后每季度额外的8年在每个流。气候和环境变量的时间模式随时间变化很大，没有明显的年际或年内模式。大型无脊椎动物的丰富度和丰度随着排放量的增加而下降，并与自上次高排放事件以来的天数呈正相关。研究结果表明，流物理化学和大型无脊椎动物组合结构的波动最终是大规模的气候现象，如ENSO事件的结果，而8年的P-富集没有出现影响大型无脊椎动物。我们的研究表明，新热带区低地流是高度动态的，并不像通常认为的那样稳定，环境参数的年内和年际变化很大，改变了淡水大型无脊椎动物组合的结构和组成。
Understanding how environmental variables influence the distribution and density of organisms over relatively long temporal scales is a central question in ecology given increased climatic variability (e.g., precipitation, ENSO events). The primary goal of our study was to evaluate long-term (15y time span) patterns of climate, as well as environmental parameters in two Neotropical streams in lowland Costa Rica, to assess potential effects on aquatic macroinvertebrates. We also examined the relative effects of an 8y whole-stream P-enrichment experiment on macroinvertebrate assemblages against the backdrop of this long-term study. Climate, environmental variables and macroinvertebrate samples were measured monthly for 7y and then quarterly for an additional 8y in each stream. Temporal patterns in climatic and environmental variables showed high variability over time, without clear inter-annual or intra-annual patterns. Macroinvertebrate richness and abundance decreased with increasing discharge and was positively related to the number of days since the last high discharge event. Findings show that fluctuations in stream physicochemistry and macroinvertebrate assemblage structure are ultimately the result of large-scale climatic phenomena, such as ENSO events, while the 8y P-enrichment did not appear to affect macroinvertebrates. Our study demonstrates that Neotropical lowland streams are highly dynamic and not as stable as is commonly presumed, with high intra- and inter-annual variability in environmental parameters that change the structure and composition of freshwater macroinvertebrate assemblages.
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DOI：
10.1073/pnas.0935903100
发表时间：
2003-05-13
影响因子：
11.1
作者：
Clark, DA;Piper, SC;Clark, DB
通讯作者：
Clark, DB
影响因子：
6.4
作者：
Faramarzi, Monireh;Abbaspour, Karim C.;Yang, Hong
通讯作者：
Yang, Hong
影响因子：
3.3
作者：
Ayón, P;Purca, S;Guevara-Carrasco, R
通讯作者：
Guevara-Carrasco, R
影响因子：
2.7
作者：
Beche, Leah A.;Resh, Vincent H.
通讯作者：
Resh, Vincent H.
影响因子：
4.4
作者：
Aguilar, E;Peterson, TC;Mayorga, R
通讯作者：
Mayorga, R