Litter identity affects assimilation of carbon and nitrogen by a shredding caddisfly

Siders, Adam C.; Compson, Zacchaeus G.; Hungate, Bruce A.; Dijkstra, Paul; Koch, George; Wymore, Adam S.; Grandy, A. Stuart; Marks, Jane C.

doi:10.1002/ecs2.2340

Cited by 13 publications

(7 citation statements)

References 76 publications

(173 reference statements)

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“…This replacement suggests functional redundancy within the shredder functional group. Results from these shredders, coupled with the negative response at the high end of the gradient of invertebrates with the 'Detritus' microhabitat, also support the idea that rapidly decomposing leaf litter does not stay in the system long enough for most shredders to utilize it (see Siders et al, 2018;andCompson et al, 2015, 2018 for examples in lotic systems); rather, element fluxes from rapidly decomposing leaf litter are expected to enter the microscopic food web (reviewed in Marks, 2019).…”

Section: Macroinvertebrate Taxon Richness and Ecosystem Functioningmentioning

confidence: 73%

Environmental filtering of macroinvertebrate traits influences ecosystem functioning in a large river floodplain

et al. 2022

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1. The biodiversity-ecosystem function hypothesis postulates that higher biodiversity is correlated with faster ecosystem process rates and increased ecosystem stability in fluctuating environments. Exhibiting high spatiotemporal habitat diversity, floodplains are highly productive ecosystems, supporting communities that are naturally resilient and highly diverse.2. We examined linkages among floodplain wetland habitats, invertebrate communities and their associated traits, and ecosystem function across 60 sites within the floodplain wetlands of the lower Wolastoq | Saint John River, New Brunswick, using structural equation modelling and Threshold Indicator Taxa ANalysis.3. We identified key environmental filters structuring invertebrate communities, by linking increased niche differentiation through shoreline change, flood pulse dynamics, and macrophyte bed complexity with increased taxa and functional diversity.4. Examination of traits linked to ecosystem functions revealed that more resilient wetlands with balance between primary productivity and decomposition as carbon sources were associated with greater functional evenness and richness, while habitat patches with elevated decomposition rates had lower functional richness, reflecting a simplified, more disturbed habitat. 5. While our more complex overarching SEM model was ultimately compromised by an overspecified number of pathways, our results nevertheless are indicative of a divergence between wetland and riverine ecosystems in their relationships linking biodiversity and ecosystem function, illustrating how to define ecosystem

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Section: Macroinvertebrate Taxon Richness and Ecosystem Functioningmentioning

confidence: 73%

Environmental filtering of macroinvertebrate traits influences ecosystem functioning in a large river floodplain

et al. 2022

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“…2018, Siders et al. 2018, Marks 2019). Genotypes from hot origins should thus promote faster cycling of energy into aquatic systems and lower abundance of aquatic invertebrates, which could translate into reduced support of predators like fish and birds.…”

Section: Discussionmentioning

confidence: 98%

“…This has serious implications for restoration because it suggests that preferentially planting hot-adapted trees to increase future survival (Grady et al 2011, Butterfield et al 2017) could impact a major ecosystem process in riparian ecosystems. Faster decomposition can facilitate rapid uptake of carbon by microorganisms, reducing carbon assimilation by invertebrates (Compson et al 2018, Siders et al 2018, Marks 2019. Genotypes from hot origins should thus promote faster cycling of energy into aquatic systems and lower abundance of aquatic invertebrates, which could translate into reduced support of predators like fish and birds.…”

Section: Trait Determinants Of Litter Decompositionmentioning

confidence: 99%

Plastic responses to hot temperatures homogenize riparian leaf litter, speed decomposition, and reduce detritivores

Jeplawy

Cooper

Marks

et al. 2021

Ecology

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Efforts to maintain the function of critical ecosystems under climate change often begin with foundation species. In the southwestern United States, cottonwood trees support diverse communities in riparian ecosystems that are threatened by rising temperatures. Genetic variation within cottonwoods shapes communities and ecosystems, but these effects may be modified by phenotypic plasticity, where genotype traits change in response to environmental conditions. Here, we investigated plasticity in Fremont cottonwood (Populus fremontii) leaf litter traits as well as the consequences of plasticity for riparian ecosystems. We used three common gardens each planted with genotypes from six genetically divergent populations spanning a 12°C temperature gradient, and a decomposition experiment in a common stream environment. We found that leaf litter area, specific leaf area, and carbon to nitrogen ratio (C:N) were determined by interactions between genetics and growing environment, as was the subsequent rate of litter decomposition. Most of the genetic variation in leaf litter traits appeared among rather than within source populations with distinct climate histories. Source populations from hotter climates generally produced litter that decomposed more quickly, but plasticity varied the magnitude of this effect. We also found that hotter growing conditions reduced the variation in litter traits produced across genotypes, homogenizing the litter inputs to riparian ecosystems. All genotypes in the hottest garden produced comparatively small leaves that decomposed quickly and supported lower abundances of aquatic invertebrates, whereas the same genotypes in the coldest garden produced litter with distinct morphologies and decomposition rates. Our results suggest that plastic responses to climate stress may constrict the expression of genetic variation in predictable ways that impact communities and ecosystems. Understanding these interactions between genetic and environmental variation is critical to our ability to plan for the role of foundation species when managing and restoring riparian ecosystems in a warming world.

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“…Taxon‐specific effects of enrichment showed that enrichment effects played out positively for taxa that exploited higher‐nutrient resources in autumn and winter, but that other taxa responded negatively to enrichment. Negative effects of enrichment in the autumn‐winter were seen in taxa with longer larval lifespans (Demi et al 2019), suggesting that a temporally consistent supply of resources might be particularly important for long‐lived taxa (Siders et al 2018). Furthermore, the enrichment period of our study ran for only 2 yr; a longer enrichment experiment increased production of primary consumers dramatically, while decreasing production of predators, especially that of longer‐lived taxa (Davis et al 2010, 2011).…”

Section: Discussionmentioning

confidence: 99%

Experimental nutrient enrichment of forest streams reduces ecosystem nitrogen and phosphorus storage

Bumpers

Rosemond

Manning

et al. 2023

Limnology & Oceanography

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Streams store nutrients in standing stocks of organic matter (OM) and associated biologically sequestered elements. Unlike standing stocks of autotrophs, detritus is depleted by nutrient enrichment, potentially reducing areal storage of detritus‐associated nutrients. To test effects of nutrient‐loading on storage of nitrogen (N) and phosphorus (P) by autotrophic and detrital‐pool compartments, we quantified the effects of 2 yr of continuous experimental N and P additions on fine benthic organic matter (FBOM), leaves, wood, and biofilms in five forest streams. Our design tested the relative strength of N vs. P on OM nutrient content, areal OM storage, and areal nutrient storage in OM types. Enrichment increased nutrient content of all OM types; %P increased more than %N in leaves, wood, and biofilms, but not FBOM. Biofilm %P and %N increased more than in all detrital types. Areal FBOM and leaf storage declined with nutrient enrichment. Biofilm standing stocks were generally higher with enrichment but were not related to the streamwater N and P gradients. Despite increased OM nutrient content, total areal nutrient storage in leaves and wood decreased due to reduced OM storage. Although annual nutrient storage was stabilized by FBOM, seasonal variation in nutrient storage increased with enrichment. Leaf‐associated nutrient storage was reduced in most seasons, whereas FBOM and biofilm nutrient storage increased in winter and spring, respectively, relative to pretreatment. Overall, the combined responses of all OM types to enrichment resulted in reduced storage and altered seasonal availability of carbon and nutrients, which has implications for consumers and downstream processes.

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Litter identity affects assimilation of carbon and nitrogen by a shredding caddisfly

Cited by 13 publications

References 76 publications

Environmental filtering of macroinvertebrate traits influences ecosystem functioning in a large river floodplain

Environmental filtering of macroinvertebrate traits influences ecosystem functioning in a large river floodplain

Plastic responses to hot temperatures homogenize riparian leaf litter, speed decomposition, and reduce detritivores

Experimental nutrient enrichment of forest streams reduces ecosystem nitrogen and phosphorus storage

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