Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1899/04-078.1 |
Drought and postdrought recovery cycles in an intermittent Mediterranean stream: structural and functional aspects | |
Acuna, V; Munoz, I; Giorgi, A; Omella, M; Sabater, F; Sabater, S | |
通讯作者 | Acuna, V |
来源期刊 | JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY
![]() |
ISSN | 0887-3593 |
出版年 | 2005 |
卷号 | 24期号:4页码:919-933 |
英文摘要 | The effects of the intensity of seasonal droughts on stream ecosystems were studied in the Fuirosos, an intermittent forested Mediterranean stream. Macroinvertebrate community structure and stream ecosystem metabolism were measured during seasonal summer droughts in 2001, 2002, and 2003. Ecosystem metabolism was profoundly affected by stream intermittency. Organic matter that accumulated during the dry period enhanced ecosystem respiration during the postdrought recovery. Highest biotic diversity was found at low water levels as the stream dried and contracted. Macroinvertebrate community response to drying was stepped and apparently defined by thresholds of transition from drying to cessation of flow and from the dry phase to restoration of flow. Environmental conditions changed markedly with cessation of flow, causing large changes in community structure during 2001 and 2003 (dry years). Drying caused an increase in macroinvertebrate density that peaked in isolated pools soon after flow ceased, but then decreased rapidly because of the physicochemical changes associated with fragmentation of the watercourse. The macroinvertebrate community at the end of the summer dry phase (when flow resumed) differed from the community that had been present before drying began. Differences in community structure during the summer dry period were not as marked in 2002 (a wet year) as in 2001/2003. The influence of drought on the macroinvertebrate community differed across substrata. Drying led to significant changes in density on cobbles and leaves, but not on sand. Few taxa resisted drying, and resilience to drying was the dominant response to disturbance in the Fuirosos. |
英文关键词 | ecosystem contraction drought effect postdrought recovery macroinvertebrate community structure stream metabolism Mediterranean streams |
类型 | Article |
语种 | 英语 |
国家 | Spain ; Argentina |
收录类别 | SCI-E |
WOS记录号 | WOS:000233839300016 |
WOS关键词 | DETRENDED CORRESPONDENCE-ANALYSIS ; MACROINVERTEBRATE COMMUNITIES ; FAUNAL COMPOSITION ; SPATIAL PATTERNS ; PUTTING THINGS ; DESERT STREAM ; RIVER ; ECOLOGY ; AUSTRALIA ; RESPONSES |
WOS类目 | Ecology ; Marine & Freshwater Biology |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/149852 |
作者单位 | (1)Univ Barcelona, Fac Biol, Dept Ecol, E-08028 Barcelona, Spain;(2)Univ Nacl Lujan, Dept Ciencias Bas, CONICET, RA-6700 Lujan, Argentina;(3)Univ Girona, Inst Aquat Ecol, Girona 17071, Spain;(4)Univ Girona, Dept Environm Sci, Girona 17071, Spain |
推荐引用方式 GB/T 7714 | Acuna, V,Munoz, I,Giorgi, A,et al. Drought and postdrought recovery cycles in an intermittent Mediterranean stream: structural and functional aspects[J],2005,24(4):919-933. |
APA | Acuna, V,Munoz, I,Giorgi, A,Omella, M,Sabater, F,&Sabater, S.(2005).Drought and postdrought recovery cycles in an intermittent Mediterranean stream: structural and functional aspects.JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY,24(4),919-933. |
MLA | Acuna, V,et al."Drought and postdrought recovery cycles in an intermittent Mediterranean stream: structural and functional aspects".JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY 24.4(2005):919-933. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。