Climate Change Data Portal
DOI | 10.1007/s10661-014-3730-9 |
Assessing the ecological condition of streams in a southeastern Brazilian basin using a probabilistic monitoring design | |
Jimenez-Valencia, Juliana1,2; Kaufmann, Philip R.3; Sattamini, Ana2; Mugnai, Riccardo2; Baptista, Darcilio Fernandes1,2 | |
发表日期 | 2014-08-01 |
ISSN | 0167-6369 |
卷号 | 186期号:8页码:4685-4695 |
英文摘要 | Prompt assessment and management actions are required if we are to reduce the current rapid loss of habitat and biodiversity worldwide. Statistically valid quantification of the biota and habitat condition in water bodies are prerequisites for rigorous assessment of aquatic biodiversity and habitat. We assessed the ecological condition of streams in a southeastern Brazilian basin. We quantified the percentage of stream length in good, fair, and poor ecological condition according to benthic macroinvertebrate assemblage. We assessed the risk of finding degraded ecological condition associated with degraded aquatic riparian physical habitat condition, watershed condition, and water quality. We describe field sampling and implementation issues encountered in our survey and discuss design options to remedy them. Survey sample sites were selected using a spatially balanced, stratified random design, which enabled us to put confidence bounds on the ecological condition estimates derived from the stream survey. The benthic condition index indicated that 62 % of stream length in the basin was in poor ecological condition, and 13 % of stream length was in fair condition. The risk of finding degraded biological condition when the riparian vegetation and forests in upstream catchments were degraded was 2.5 and 4 times higher, compared to streams rated as good for the same stressors. We demonstrated that the GRTS statistical sampling method can be used routinely in Brazilian rain forests and other South American regions with similar conditions. This survey establishes an initial baseline for monitoring the condition and trends of streams in the region. |
英文关键词 | Ecological assessment;Streams;Probabilistic monitoring design;Multimetric index;Relative risk |
语种 | 英语 |
WOS记录号 | WOS:000338275500004 |
来源期刊 | ENVIRONMENTAL MONITORING AND ASSESSMENT |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/59410 |
作者单位 | 1.Univ Fed Rio de Janeiro, Inst Biol, Ilha Fundao, Programa Posgrad Ecol, BR-21941590 Rio de Janeiro, Brazil; 2.Fiocruz MS, IOC, Lab Avaliacao & Promocao Saude Ambiental, BR-21040360 Rio De Janeiro, Brazil; 3.US EPA, Corvallis, OR 97333 USA |
推荐引用方式 GB/T 7714 | Jimenez-Valencia, Juliana,Kaufmann, Philip R.,Sattamini, Ana,et al. Assessing the ecological condition of streams in a southeastern Brazilian basin using a probabilistic monitoring design[J]. 美国环保署,2014,186(8):4685-4695. |
APA | Jimenez-Valencia, Juliana,Kaufmann, Philip R.,Sattamini, Ana,Mugnai, Riccardo,&Baptista, Darcilio Fernandes.(2014).Assessing the ecological condition of streams in a southeastern Brazilian basin using a probabilistic monitoring design.ENVIRONMENTAL MONITORING AND ASSESSMENT,186(8),4685-4695. |
MLA | Jimenez-Valencia, Juliana,et al."Assessing the ecological condition of streams in a southeastern Brazilian basin using a probabilistic monitoring design".ENVIRONMENTAL MONITORING AND ASSESSMENT 186.8(2014):4685-4695. |
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