Horizontal and vertical structuring in the dispersal of adult aquatic insects in a fragmented landscape

Didham, Raphaël K.; Blakely, Tanya J.; Ewers, Robert M.; Hitchings, Terry R.; Ward, John B.; Winterbourn, Michael J.

doi:10.1127/1863-9135/2012/0243

Cited by 47 publications

(39 citation statements)

References 39 publications

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“…Such vegetation often represents a barrier for lateral dispersal thus limiting colonization potential of many species [5], [20], [25], as was also shown in our study. More recent insights from field and modelling studies on exchange of genetic material across landscapes imply that lateral dispersal occurs more often than previously expected [13], [21], [23], [24], however the data is still scarce and for many taxa the data is inconclusive [22].…”

Section: Discussionmentioning

confidence: 97%

“…We, therefore, implemented a movement pattern in between those two extremes. Consequently, our model yields conservative estimates on dispersal potential of our model species, possibly underestimating distances that individuals may cover in real environments [24].…”

Section: Discussionmentioning

confidence: 99%

“…The population dynamics model makes use of dispersal rates derived from the movement model. Both models were programmed within the NetLogo platform [24]. Here we provide a short description of the movement and population model processes following the ODD protocol [47], while the full model description can be found in SI I.…”

Section: Methodsmentioning

confidence: 99%

“…across landscapes and away from the aquatic habitat [8]. Many insect species are often weak flyers, carried by the wind, and seldom move laterally from their natal waterbody [18]–[20], though the evidence that this occurs more often than previously thought is increasing [13], [21]–[24]. Such species, including various chironomids [25]–[28], use riparian vegetation as windbreaks [29] and for the completion of their life-cycles.…”

Section: Introductionmentioning

confidence: 99%

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Persistence of Aquatic Insects across Managed Landscapes: Effects of Landscape Permeability on Re-Colonization and Population Recovery

et al. 2013

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Human practices in managed landscapes may often adversely affect aquatic biota, such as aquatic insects. Dispersal is often the limiting factor for successful re-colonization and recovery of stressed habitats. Therefore, in this study, we evaluated the effects of landscape permeability, assuming a combination of riparian vegetation (edge permeability) and other vegetation (landscape matrix permeability), and distance between waterbodies on the colonization and recovery potential of weakly flying insects. For this purpose, we developed two models, a movement and a population model of the non-biting midge, Chironomus riparius, an aquatic insect with weak flying abilities. With the movement model we predicted the outcome of dispersal in a landscape with several linear water bodies (ditches) under different assumptions regarding landscape-dependent movement. Output from the movement model constituted the probabilities of encountering another ditch and of staying in the natal ditch or perishing in the landscape matrix, and was used in the second model. With this individual-based model of midge populations, we assessed the implications for population persistence and for recovery potential after an extreme stress event. We showed that a combination of landscape attributes from the movement model determines the fate of dispersing individuals and, once extrapolated to the population level, has a big impact on the persistence and recovery of populations. Population persistence benefited from low edge permeability as it reduced the dispersal mortality which was the main factor determining population persistence and viability. However, population recovery benefited from higher edge permeability, but this was conditional on the low effective distance that ensured fewer losses in the landscape matrix. We discuss these findings with respect to possible landscape management scenarios.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Persistence of Aquatic Insects across Managed Landscapes: Effects of Landscape Permeability on Re-Colonization and Population Recovery

et al. 2013

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“…Elliott (2003) investigated short-term, short-distance movement using small artificial streams. Lastly, dispersal directions by winged adults was studied using traps along and perpendicular to streams (Kovats et al, 1996;Petersen et al, 2004) and even at different heights above the ground (Didham et al, 2012). We used a manipulative field experiment in the present study to tease apart potential modes of macroinvertebrate dispersal into experimentally restored stream reaches.…”

Section: Introductionmentioning

confidence: 99%

Short-term colonization dynamics of macroinvertebrates in restored channelized streams

Baumgartner

Robinson

2016

Hydrobiologia

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Macroinvertebrate colonization of restored rivers is a function of dispersal into the restored reach and its suitability for population establishment. To maximize potential for colonization success, spatial considerations such as distance to colonizer source pools and dispersal pathways must be included in restoration planning. Unfortunately, the dispersal abilities of macroinvertebrates and ecological importance of different dispersal modes for colonization are still poorly understood. We used a field experiment that controlled colonization by passive drift and allowed distinction between active upstream aquatic and active/passive aerial dispersal, thus testing their differential importance during colonization of experimentally restored stream reaches. Two agricultural streams emanating below culverts were longitudinally separated along the first 30 m and one stream side each was covered with a fine-mesh net to limit aerial dispersal.Colonization of manually disturbed background and experimentally introduced cobble substrate was investigated over 6 months. We found that upstream instream dispersal, especially in these agricultural streams, can be rapid (days) and play an important role in the short-term colonization of restored streams. We conclude that a landscape perspective, in addition to instream measures, must be considered when attempting to restore streams dominated by agricultural and urban land use that constrains available species pools and limits dispersal pathways.

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Estimates of resource transfer via winged adult insects from the hyporheic zone in a gravel‐bed river

Rahman

Negishi

Akasaka

et al. 2021

Ecology and Evolution

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Horizontal and vertical structuring in the dispersal of adult aquatic insects in a fragmented landscape

Cited by 47 publications

References 39 publications

Persistence of Aquatic Insects across Managed Landscapes: Effects of Landscape Permeability on Re-Colonization and Population Recovery

Persistence of Aquatic Insects across Managed Landscapes: Effects of Landscape Permeability on Re-Colonization and Population Recovery

Short-term colonization dynamics of macroinvertebrates in restored channelized streams

Estimates of resource transfer via winged adult insects from the hyporheic zone in a gravel‐bed river

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