How hydroperiod and species richness affect the balance of resource flows across aquatic-terrestrial habitats

Schriever, Tiffany A.; Cadotte, Marc W.; Williams, D. Dudley

doi:10.1007/s00027-013-0320-9

Cited by 43 publications

(46 citation statements)

References 68 publications

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“…The magnitude and importance of resource transfers across the interface between land and water is increasingly recognized (e.g., Baxter, Fausch & Saunders, ; Richardson, Zhang & Marczak, ). Adult aquatic insects flying from streams and lakes to adjacent terrestrial systems represent the most prominent flux of organic matter and nutrients originating from fresh waters (Richardson et al ., ; but see Schriever, Cadotte & Williams, ). These aquatic insects are important food sources to a wide range of riparian predators, such as arthropods, birds, bats and amphibians (Sabo & Power, ; Iwata, Urabe & Mitsuhashi, ; Reimer, Baerwald & Barglay, ; Stenroth et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Waterbugs (Heteroptera: Nepomorpha and Gerromorpha) as sources of essential n‐3 polyunsaturated fatty acids in Central Siberian ecoregions

et al. 2016

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Summary Aquatic systems are considered to be a main source of essential long‐chain n‐3 polyunsaturated fatty acids (PUFA), which are preferentially synthesized by microalgae and transferred along food chains to terrestrial consumers. Emerging aquatic insects comprise a significant part of this transfer of the essential PUFA from water to land. Quantitative data on PUFA content and composition are available mainly for rheophilic insects while taxa that are characteristic of wetlands and stagnant water bodies, such as aquatic Heteroptera, remain relatively unstudied. We investigated the role of various waterbug taxa (Heteroptera: Nepomorpha and Gerromorpha) inhabiting different ecoregions in temperate Central Siberia (Russia) as potential sources of PUFA. The ecoregions were steppe, forest‐steppe, hemiboreal forest and montane coniferous forest. Although these waterbugs insects are aquatic in both larval and adult stages, they can disperse through the landscape and transfer essential PUFAs from water to land so making them potentially available to terrestrial consumers. Species of Naucoridae, Notonectidae and Corixidae were generally dominant in all ecoregions, attaining maximum biomass in the steppe. We showed that habitat or ecoregion played a major role in the variability of fatty acid composition of Notonectidae and Gerridae but not Corixidae. In contrast, the biochemical composition of the only naucoridae, Ilyocoris cimicoides, was largely affected by life stage. Both the dominant families and species within them differed with respect to their mass‐specific contents of essential long‐chain PUFA of the n‐3 family, namely eicosapentaenoic and docosahexaenoic acids. Corixid species had the highest content of these two essential PUFAs among the waterbug studies, and relative to literature reports for other aquatic insects. Corixids thus appear to be a potentially important vector for transfer of the essential biochemical compounds from water to land, especially in steppe ecoregions with numerous ephemeral water bodies.

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Section: Introductionmentioning

confidence: 99%

Waterbugs (Heteroptera: Nepomorpha and Gerromorpha) as sources of essential n‐3 polyunsaturated fatty acids in Central Siberian ecoregions

et al. 2016

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“…Although many temporary ponds are small, they are often common habitat features across landscapes (Semlitsch & Bodie, ). They contain unique species assemblages that are not just subsets of those in larger wetlands and may contribute larger fluxes per unit area than larger or more permanent wetlands (Schriever et al., ; Snodgrass et al., ). Climate change threatens temporary pond species by altering hydroperiod (Junk et al., ; Scheele, Driscoll, Fischer, & Hunter, ).…”

Section: Discussionmentioning

confidence: 99%

Amphibian‐mediated nutrient fluxes across aquatic–terrestrial boundaries of temporary wetlands

Fritz

Whiles

2018

Freshwater Biology

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Resource subsidies of energy and nutrients can be transported via physical forces, such as gravity, wind or water and biotic processes, such as animal migration or emigration. Migratory transport of nutrient subsidies may be associated with reproductive processes, such as the deposition of eggs or emigration of juveniles to adult habitats. We quantified net nutrient fluxes associated with amphibian migrations across aquatic–terrestrial boundaries of eight temporary ponds in Illinois, USA. We measured carbon (C), nitrogen (N) and phosphorus (P) subsidies from terrestrial environments to ponds, in the form of eggs, and the reciprocal subsidies from ponds to terrestrial environments via juvenile emigration. Juvenile emergence biomass did not follow patterns of egg biomass, as not all species bred successfully in each pond, resulting in variability in the magnitude of nutrient fluxes both across ponds and species. The terrestrial environment was not always the recipient system of net nutrient fluxes. Hydroperiod, trophic interactions and species composition explained some dynamics of N and P subsidies. Anthropogenic alterations that affect amphibian communities, such as habitat fragmentation and conversion for agriculture and urbanisation, could have large‐scale impacts on nutrient fluxes and connectivity of temporary pond–forest systems.

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“…However, the resources flowing out of lakes (mostly in the form of animal biomass) tend to be high-quality food items, and aquatic resources can be just as important to terrestrial animals as terrestrial resources are to aquatic animals (Bartels et al 2012). The emergence of aquatic insects (Gratton and Vander Zanden 2009;Bartrons et al 2013;Dreyer et al 2015) and amphibians (Regester et al 2006;Gibbons et al 2006;Schriever et al 2013) are the best studied lake-to-land resource flows, and these subsidies can have important effects on terrestrial ecosystems (Richardson and Sato 2015). For example, changes in consumer density and behavior associated with emerging aquatic insects can have cascading top-down effects on lower trophic levels in riparian areas surrounding streams (Henschel et al 2001;Murakami and Nakano 2002;Sabo and Power 2002), and the deposition of aquatic insect carcasses can represent an important source of nutrients to terrestrial plants near lakes (Hoekman et al 2012), with consequent bottom-up effects on higher trophic levels (Bultman et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Variation in reciprocal subsidies between lakes and land: perspectives from the mountains of California

Piovia‐Scott

Sadro

Knapp³

et al. 2016

Can. J. Fish. Aquat. Sci.

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Lakes are connected to surrounding terrestrial habitats by reciprocal flows of energy and nutrients. We synthesize data from California's mountain lake catchments to investigate how these reciprocal subsidies change along an elevational gradient and with the introduction of a top aquatic predator. At lower elevations, well-developed terrestrial vegetation provides relatively large inputs of organic material to lakes, whereas at higher elevations, the paucity of terrestrial vegetation provides minimal organic input but allows for higher inputs of inorganic nitrogen. There are also pronounced elevational patterns in amphibians and aquatic insects, which represent important vectors for resource flows from lakes back to land. The introduction of trout can reduce this lake-to-land resource transfer, as trout consume amphibians and aquatic insects. We propose a conceptual model in which within-lake processes influence terrestrial consumers at higher elevations, while terrestrial inputs govern within-lake processes at lower elevations. This model contributes to a more general understanding of the connections between aquatic and terrestrial habitats in complex landscapes.Résumé : Les lacs sont reliés aux habitats terrestres qui les entourent par des flux réciproques d'énergie et de nutriments. Nous mettons en rapport des données tirées de bassins versants de lacs de montagne en Californie pour étudier les variations de ces apports réciproques le long d'un gradient altitudinal et après l'introduction d'un prédateur aquatique de niveau trophique supérieur. À basse altitude, une végétation terrestre bien développée fournit de relativement grands apports de matière organique aux lacs, alors qu'à plus haute altitude, la rareté de la végétation terrestre fournit peu d'apports organiques, mais permet des apports d'azote inorganique plus importants. Des variations altitudinales marquées sont également observées chez les amphibiens et les insectes aquatiques, qui représentent d'importants vecteurs pour les flux de ressources des lacs vers la terre. L'introduction de truites peut réduire ce transfert de ressources des lacs vers la terre, puisque les truites consomment des amphibiens et des insectes aquatiques. Nous proposons un modèle conceptuel dans lequel les processus internes des lacs influencent les consommateurs terrestres à plus haute altitude, alors que les apports terrestres régissent les processus internes des lacs de plus basse altitude. Ce modèle participe à une compréhension plus générale des liens entre les habitats aquatiques et terrestres dans des paysages complexes. [Traduit par la Rédaction]

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How hydroperiod and species richness affect the balance of resource flows across aquatic-terrestrial habitats

Cited by 43 publications

References 68 publications

Waterbugs (Heteroptera: Nepomorpha and Gerromorpha) as sources of essential n‐3 polyunsaturated fatty acids in Central Siberian ecoregions

Waterbugs (Heteroptera: Nepomorpha and Gerromorpha) as sources of essential n‐3 polyunsaturated fatty acids in Central Siberian ecoregions

Amphibian‐mediated nutrient fluxes across aquatic–terrestrial boundaries of temporary wetlands

Variation in reciprocal subsidies between lakes and land: perspectives from the mountains of California

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