Flooding Impacts on Responses of a Riparian Consumer to Cross-Ecosystem Subsidies

Greenwood, Michelle J.; McIntosh, Angus R.

doi:10.1890/07-0749.1

Cited by 51 publications

(68 citation statements)

References 27 publications

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“…However, the abundance of aquatic prey was highest at stable rivers. Spider biomass peaked at the intermediate levels of stability, suggesting the existence of a trade off between habitat quality and subsidy availability (Greenwood and McIntosh, 2008).…”

Section: Flows From Streams To Terrestrial Areasmentioning

confidence: 99%

“…Disturbance can also interact with flows of subsidies. For instance, Greenwood and McIntosh (2008) demonstrated that flood disturbances positively influenced aspects of habitat quality of a riparian fishing spider-there was a higher proportion of habitat in the more disturbed rivers. However, the abundance of aquatic prey was highest at stable rivers.…”

Section: Flows From Streams To Terrestrial Areasmentioning

confidence: 99%

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Resource subsidies across the land–freshwater interface and responses in recipient communities

Richardson

Zhang

Marczak

2010

River Research & Apps

192

159

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Fluxes of resource subsidies, such as terrestrial leaf litter to streams and adult aquatic insects to riparian predators, are examples of important links between adjacent ecosystems. The importance of these cross-ecosystem resource flows from donor systems to recipient consumers is increasingly recognized. Streams, especially small streams with their high edge ratio with the terrestrial system, provide excellent models for the study of subsidies and a large portion of this literature has been produced by aquatic scientists. Field experiments manipulating flows between small streams and their riparian areas (e.g. leaf litter, terrestrial invertebrates, and adult aquatic insects to riparian areas) have indicated that consumers in streams and riparian areas are highly dependent upon such subsidies and the value of the subsidies are further modified by patterns of retention and pathways of use. Experiments typically indicate rapid growth or demographic responses by consumers, indicating these populations are resource limited or at levels of incipient population limitation, and can capitalize on short-term resource pulses. More press manipulations are still necessary to determine the dynamical consequences of subsidies for recipient communities. The nature of the subsidy (e.g. species of litter or invertebrates) and its timing are also important details that need further study. Finally, there are opportunities to consider the evolution of life cycle timing (modelling), interception strategies by recipient populations and short-term and long-term responses of communities.

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Section: Flows From Streams To Terrestrial Areasmentioning

confidence: 99%

Section: Flows From Streams To Terrestrial Areasmentioning

confidence: 99%

Resource subsidies across the land–freshwater interface and responses in recipient communities

Richardson

Zhang

Marczak

2010

River Research & Apps

192

159

View full text Add to dashboard Cite

show abstract

“…Accordingly, much research attention has focused on how terrestrial environmental features regulate subsidy dispersal and the responses of terrestrial consumers (e.g. forest cover, complexity of ground habitats, availability of terrestrial resources), and on how human activities alter these linkages (Petersen et al 2004;Greenwood and McIntosh 2008;Marczak and Richardson 2008;Stenroth et al 2015). However, both the timing and extent of dispersal by adult aquatic insects are further regulated by their species-specific life history traits (Greenwood and Booker 2016).…”

Section: Introductionmentioning

confidence: 99%

Species traits reveal effects of land use, season and habitat on the potential subsidy of stream invertebrates to terrestrial food webs

et al. 2018

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Adult aquatic insects with a terrestrial life-stage are important vectors transferring resources assimilated in freshwater environments to terrestrial consumers. Research on this linkage has focused particularly on how terrestrial environmental features affect dispersal of adult aquatic insects, and on the responses of terrestrial consumers. However, both the timing and extent of dispersal by adult aquatic insects are further regulated by their species-specific life history traits. We sampled aquatic invertebrates from nine streams in central Sweden, and assessed how the composition of key traits related to dispersal and life history varied between in-stream habitats (riffles, pools), seasons (autumn, spring), and among streams differing in catchment land use (forested, agriculture). Traits indicative of more limited adult dispersal (e.g. small adult size and weak flying strength), along with traits indicative of strongly pulsed peaks in emergence (e.g. univoltinism and well-synchronised emergence) were all more abundant in the agricultural than forested streams in the autumn. However, these differences had disappeared by late spring, possibly reflecting early emergence by the univoltine taxa that dominated the agricultural stream communities and/or elevated mortality in the agricultural streams. Riffles supported higher abundances of insects with strongly flying adults, whereas traits associated with more limited dispersal were characteristic of insect assemblages in pools, which also supported the highest proportion of invertebrates completely lacking an adult flying stage. This result is likely to have implications at larger scales, given the dominance of soft-bottomed pool habitats and scarcity of riffles in many agricultural landscapes. Overall, our analysis indicates that while overall production of aquatic invertebrates with a winged adult was greater in agricultural streams, availability of this productivity for terrestrial consumers is more likely to be spatially restricted closer to the stream channel, and potentially also more temporally pulsed .

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“…Such a scenario is expected to be common in natural systems under recurrent perturbation dynamics [15]. For instance, spatial flows of nutrients and detritus from a forest to a lake or a river are greatly affected following a fire due to & 2016 The Author(s) Published by the Royal Society.…”

Section: Introductionmentioning

confidence: 99%

Spatially cascading effect of perturbations in experimental meta-ecosystems

et al. 2016

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Ecosystems are linked to neighbouring ecosystems not only by dispersal, but also by the movement of subsidy. Such subsidy couplings between ecosystems have important landscape-scale implications because perturbations in one ecosystem may affect community structure and functioning in neighbouring ecosystems via increased/decreased subsidies. Here, we combine a general theoretical approach based on harvesting theory and a two-patch protist metaecosystem experiment to test the effect of regional perturbations on local community dynamics. We first characterized the relationship between the perturbation regime and local population demography on detritus production using a mathematical model. We then experimentally simulated a perturbation gradient affecting connected ecosystems simultaneously, thus altering crossecosystem subsidy exchanges. We demonstrate that the perturbation regime can interact with local population dynamics to trigger unexpected temporal variations in subsidy pulses from one ecosystem to another. High perturbation intensity initially led to the highest level of subsidy flows; however, the level of perturbation interacted with population dynamics to generate a crash in subsidy exchange over time. Both theoretical and experimental results show that a perturbation regime interacting with local community dynamics can induce a collapse in population levels for recipient ecosystems. These results call for integrative management of human-altered landscapes that takes into account regional dynamics of both species and resource flows.

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Flooding Impacts on Responses of a Riparian Consumer to Cross-Ecosystem Subsidies

Cited by 51 publications

References 27 publications

Resource subsidies across the land–freshwater interface and responses in recipient communities

Resource subsidies across the land–freshwater interface and responses in recipient communities

Species traits reveal effects of land use, season and habitat on the potential subsidy of stream invertebrates to terrestrial food webs

Spatially cascading effect of perturbations in experimental meta-ecosystems

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