Scale-dependent patterns of metacommunity structuring in aquatic organisms across floodplain systems

Author(s):Show less -

Lansac-Toha, Fernando M. ^[1] ; Bini, Luis M. ^[2] ; Heino, Jani ^[3] ; Meira, Bianca R. ^[1] ; Segovia, Bianca T. ^[4] ; Pavanelli, Carla S. ^[1] ; Bonecker, Claudia C. ^[1] ; de Deus, Claudia P. ^[5] ; Benedito, Evanilde ^[1] ; Alves, Geziele M. ^[6] ; Manetta, Gislaine I. ^[1] ; Dias, Juliana D. ^[7] ; Vieira, Ludgero C. G. ^[8] ; Rodrigues, Luzia C. ^[1] ; do Carmo Roberto, Maria ^[1] ; Brugler, Mercer R. ^{[9, 10]} ; Lemke, Michael J. ^[11] ; Tessler, Michael ^[9] ; DeSalle, Rob ^[9] ; Mormul, Roger P. ^[1] ; Amadio, Sidineia ^[4] ; Lolis, Solange F. ^[12] ; Jati, Susicley ^[1] ; Siqueira, Tadeu ^[13] ; Silva, Willian M. ^[14] ; Higuti, Janet ^[1] ; Lansac-Toha, Fabio A. ^[1] ; Martens, Koen ^{[15, 16]} ; Velho, Luiz Felipe M. ^{[1, 17]}

Affiliation:Show less -

^[1] Univ Estadual Maringa UEM, DBI PEA NUPELIA, Ave Colombo 5790, BR-87020900 Maringa, Parana - Brazil

^[2] Univ Fed Goias UFG, Inst Ciencias Biol, Dept Ecol, Goiania, Go - Brazil

^[3] Finnish Environm Inst SYKE, Freshwater Ctr, Oulu - Finland

^[4] Univ British Columbia, Dept Bot, Vancouver, BC - Canada

^[5] INPA Inst Nacl Pesquisas Amazonia, Manaus, Amazonas - Brazil

^[6] Ctr Univ Inga Uninga Engn Eletr, Maringa, Parana - Brazil

^[7] Univ Fed Rio Grande Norte UFRN, Dept Oceanog & Limnol DOL, Natal, RN - Brazil

^[8] Univ Brasilia UnB, Planaltina - Brazil

^[9] Amer Museum Nat Hist, New York, NY 10024 - USA

^[10] Univ South Carolina Beaufort, Dept Nat Sci, Beaufort, SC - USA

^[11] Univ Illinois, Dept Biol, Springfield, IL - USA

^[12] Univ Fed Tocantins UFT, Dept Ecol & Conservacao, Programa Posgrad Ecol Ecotono, Porto Nacl - Brazil

^[13] Univ Estadual Paulista UNESP, Inst Biociencias, Dept Ecol, Rio Claro - Brazil

^[14] Univ Fed Mato Grosso Sul UFMS, Corumba - Brazil

^[15] Univ Ghent, Dept Biol, Ghent - Belgium

^[16] OD Nat, Royal Belgian Inst Nat Sci RBINS, Brussels - Belgium

^[17] Inst Cesumar Ciencia Tecnol & Inovacao ICETI, UniCesumar PPGTL, Maringa, Parana - Brazil

• Document type: Journal article
• Source: Journal of Biogeography; v. 48, n. 4 DEC 2020.
• Web of Science Citations: 1

Abstract

Aim Evaluating how groups of organisms vary in dispersal capability and how environmental, spatial and temporal signals vary across multiple scales is critical to elucidating metacommunity theory. We examined whether the relative contributions of environmental, spatial and hydrological factors have different effects on organismal groups with different dispersal abilities at three spatial scales, and how this knowledge contributes to our understanding of metacommunity dynamics. Location Four major Brazilian floodplains, with the largest distance among them of 2,300 Km. Taxon 10 aquatic organismal groups, ranging from bacterioplankton to fish. Methods We sampled lakes connected to the main river in the low- and high-water periods of each floodplain between 2011 and 2012. Different biological groups were analysed across three hierarchical spatial scales (fine, intermediate and subcontinental) within and between floodplain systems. We applied a series of partial redundancy analyses to estimate the relative contributions of environmental factors, spatial factors and hydrological period for each biological group. Results At the fine spatial scale, predominantly environmental factors and hydrological period structure metacommunities, although less so for microorganisms than for micro-invertebrates and macro-organisms. The relative importance of environmental factors increased at the intermediate spatial scale. At the subcontinental scale, the relative importance of spatial factors increased for all biological groups, but environmental factors remained the primary regulators of microorganisms even at the largest scale. Main conclusions This study design allowed us to make more robust inferences about the mechanisms responsible for regulating community structure of distinct biological groups at different spatial scales. Our results suggest that biological groups displaying distinct body size likely determine the spatial extent at which environmental, spatial and hydrological processes prevail as the primary regulators of community structure. These findings are important in guiding the conservation and management of floodplain biodiversity because these systems are naturally highly heterogeneous in space and time. (AU)

• FAPESP's process: 13/50424-1 - Scaling biodiversity in tropical and boreal streams: implications for diversity mapping and environmental assessment (ScaleBio)
• Grantee: Tadeu de Siqueira Barros
• Support Opportunities: Regular Research Grants