Aerial dispersal of aquatic invertebrates along and away from arid-land streams

Bogan, Michael T.; Boersma, Kate S.

doi:10.1899/12-066.1

Cited by 85 publications

(86 citation statements)

References 42 publications

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“…The influence of dendritic network structure also depends heavily on the traits of organisms, particularly traits that are related to dispersal (Bogan & Boersma, 2012;Brown & Swan, 2010;Finn, Theobald, Black, & Poff, 2006;Razeng et al, 2016;Schmera et al 2017). This last point is of particular significance for organisms that disperse overland, therefore forgoing the constraints of network structure to some extent (Bogan & Boersma, 2012;Razeng et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

Experimentally disentangling the influence of dispersal and habitat filtering on benthic invertebrate community structure

2017

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Abstract1. Ecological communities are structured by a combination of local processes like habitat filtering and species interactions, and regional forces driven by the dispersal of organisms between localities on a landscape. Previous studies suggest that the position of local communities within a dispersal network can greatly influence the relative influence of these two sets of processes on community assembly. However, the majority of previous investigations have used models or inferences based on observational data to investigate these hypotheses, while experiments directly addressing this question have been rare. 2.We experimentally investigated the relative influence of local and regional processes in structuring benthic invertebrate communities using artificial streams.We manipulated three factors-source pool for the macroinvertebrate community (headwater vs. mainstem) as a surrogate of network location, habitat complexity (high vs. low) in the flume, and dispersal (high vs. low)-and followed changes in macroinvertebrate community structure for 8 weeks.3. Previous research suggests that because headwater (HW) streams are isolated within river networks, HWs are less influenced by regional processes relative to more well-connected mainstems (MSs). We therefore predicted (i) that flumes colonised from a HW source community would respond more strongly to our dispersal treatment than those colonised by MS communities because MS were already largely structured through dispersal-driven processes, and (ii) that both HW and MS communities would respond to manipulations of local habitat, indicating that responses to the dispersal treatment were a direct result of dispersal driven dynamics rather than specific affinity for conditions in the flumes.4. Both of our predictions were strongly supported by the results of the experiment. For flumes with HW source pools, the high dispersal treatment had significantly higher diversity than low dispersal flumes. However, this difference only occurred in flumes with HW source pools and did not occur in flumes with MS sources. There was also strong evidence of community composition in HW flumes shifting significantly towards the macroinvertebrate composition in our experimental dispersal treatment. The major effect of experimental dispersal was to introduce new species in fairly low abundances as would be expected from dispersal via drift over a relatively short time. Both MS and HW colonised flumes showed highly significant signals of habitat filtering, though the influence of specific habitat differed between the source types.

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Section: Resultsmentioning

confidence: 99%

Experimentally disentangling the influence of dispersal and habitat filtering on benthic invertebrate community structure

2017

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“…The progressive increase of richness on a temporal scale is a recurrent pattern observed in temporary streams (Bogan and Boersma, 2012;Carvalho and Uieda, 2006). However, the experiment showed a constant turnover of taxa in the streams instead of taxon accumulation.…”

Section: Community Otus Turnover Aspects In Successionmentioning

confidence: 99%

“…In tropical permanent streams the main insect colonization route is downstream, with individuals moving actively or passively by drift in the longitudinal axis of the stream and crawling through the other two dimensions (transversal and water column) following the substrate (Carvalho and Uieda, 2006). Although downstream movement is important, the aerial route is one of the most important sources of aquatic insects in the early colonization of temporary streams (Bogan and Boersma, 2012;Landeiro et al, 2011;Williams and Hynes, 1976). The aerial route depends on the source of adult insects in the region, and the oviposition in a specific stream is an arbitrary event, leading to the elevated community turnover rate observed each week.…”

Section: Metacommunity Importance To Successional Dynamicsmentioning

confidence: 99%

Successional colonization of temporary streams: An experimental approach using aquatic insects

et al. 2016

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“…). For example, dry stream channels can serve as dispersal corridors for terrestrial adult forms (Bogan and Boersma ; Steward et al. ), and stream networks can create transportation corridors for terrestrial and semiaquatic fauna (Sánchez‐Montoya et al.…”

Section: Biological Connectivity Throughout Femsmentioning

confidence: 99%

Biota Connect Aquatic Habitats throughout Freshwater Ecosystem Mosaics

Schofield

Alexander

Ridley

et al. 2018

J American Water Resour Assoc

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Freshwater ecosystems are linked at various spatial and temporal scales by movements of biota adapted to life in water. We review the literature on movements of aquatic organisms that connect different types of freshwater habitats, focusing on linkages from streams and wetlands to downstream waters. Here, streams, wetlands, rivers, lakes, ponds, and other freshwater habitats are viewed as dynamic freshwater ecosystem mosaics (FEMs) that collectively provide the resources needed to sustain aquatic life. Based on existing evidence, it is clear that biotic linkages throughout FEMs have important consequences for biological integrity and biodiversity. All aquatic organisms move within and among FEM components, but differ in the mode, frequency, distance, and timing of their movements. These movements allow biota to recolonize habitats, avoid inbreeding, escape stressors, locate mates, and acquire resources. Cumulatively, these individual movements connect populations within and among FEMs and contribute to local and regional diversity, resilience to disturbance, and persistence of aquatic species in the face of environmental change. Thus, the biological connections established by movement of biota among streams, wetlands, and downstream waters are critical to the ecological integrity of these systems. Future research will help advance our understanding of the movements that link FEMs and their cumulative effects on downstream waters.

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Aerial dispersal of aquatic invertebrates along and away from arid-land streams

Cited by 85 publications

References 42 publications

Experimentally disentangling the influence of dispersal and habitat filtering on benthic invertebrate community structure

Experimentally disentangling the influence of dispersal and habitat filtering on benthic invertebrate community structure

Successional colonization of temporary streams: An experimental approach using aquatic insects

Biota Connect Aquatic Habitats throughout Freshwater Ecosystem Mosaics

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