Marine Ecology Progress Series | |
Factoring scales of spatial and temporal variation in fish abundance in a subtropical estuary | |
,, J. P. Vieira1  L. E. Moraes1  A. M. Garcia1  K. O. Winemiller1  E. T. Paes1  | |
关键词: Time-series analyses; Partitioning variation; Estuarine-dependent species; Mullet ; Whitemouth croaker; Argentine menhaden; Patos Lagoon estuary; Brazilian-LTER; | |
DOI : 10.3354/meps09798 | |
学科分类:海洋学与技术 | |
来源: Inter-Research | |
【 摘 要 】
ABSTRACT: We employed a new approach linking multivariate and time series analyses to identify common versus unique spatiotemporal components of abundance variation of marine spawning fishes recruiting into a subtropical Western Atlantic estuary. Based on a 10 yr standardized monthly data set, we also investigated patterns of association for local and regional factors with annual and inter-annual variation in abundance of 5 dominant marine estuarine-dependent fishes. The total amount of variation in fish abundance explained by environmental variables was 22.4%. After factoring out shared spatiotemporal variation (0.8%), our analysis showed that temporal components had an almost 5-fold greater contribution (28.0%) than spatial components (6.4%) in explaining the variation in abundance of the 5 species. Most of the variation across the temporal scale (58.5%) was associated with annual (from 0.5 to 1.3 yr) rather than multi-year oscillations (>2 yr). Such annual patterns were probably associated with adaptations of marine estuarine-dependent fishes for exploiting predictable pulses in seasonal productivity typically found in subtropical estuaries. In contrast, inter-annual variation in abundance occurring at a scale of 3 to 7 yr could be attributed to rainfall anomalies associated with El Niño Southern Oscillation (ENSO) events, whereas those occurring at a scale of 2 yr could be influenced by the Southern Annular Mode (SAM). Our findings corroborate the hypothesis that prevalent annual patterns of variation in the abundance of marine estuarine-dependent fishes are associated with predictable productivity pulses linked to the annual temperature regime, whereas inter-annual variations in fish abundance are associated with the influence of large-scale climatic phenomena.
【 授权许可】
Unknown
【 预 览 】
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RO201912010135044ZK.pdf | 8KB | download |