Reciprocal Role of Salamanders in Aquatic Energy Flow Pathways

Sánchez‐Hernández, Javier

doi:10.3390/d12010032

Cited by 11 publications

(10 citation statements)

References 107 publications

(193 reference statements)

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“…Amphibian emergence from ponds represents a substantial high‐quality subsidy to the terrestrial environment, but studies of these fluxes have been restricted to a small number of ponds and limited taxa (e.g., Reinhardt et al 2013, Schriever et al 2014, Capps et al 2015). Furthermore, unlike emergence of aquatic insects, we know of no studies that have examined the importance of amphibian emergence to terrestrial consumers' diets directly (but for review of amphibians of prey, see Toledo 2005; Toledo et al 2007; Sánchez‐Hernández 2020). Amphibian egg inputs to study ponds represented only 0.2% of total subsidies, but eggs are highly labile (Regester and Whiles 2006; Capps et al 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, a mosaic of small ponds may produce greater or equivalent subsidies than a single large pond. This could have major implications for the surrounding terrestrial food web, given the diversity of animals that consume amphibians (Toledo 2005; Toledo et al 2007; Sánchez‐Hernández 2020). This also has potential consequences for conservation efforts because temporary ponds are poorly protected ecosystems (Floress et al 2017) and small ponds can be hard to distinguish as landscape features when they are not holding water.…”

Section: Discussionmentioning

confidence: 99%

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Reciprocal subsidies between temporary ponds and riparian forests

Fritz

Whiles

2021

Limnology & Oceanography

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Aquatic habitats are closely linked to surrounding terrestrial systems via reciprocal subsidies. Much of the research on aquatic–terrestrial subsidies has focused on streams and lakes, while subsidies across aquatic–terrestrial boundaries of other systems, like temporary ponds, have received less attention. To address the lack of information regarding cross‐habitat subsidies of temporary ponds, we quantified leaf litter inputs, amphibian egg inputs, terrestrial insect inputs, and amphibian metamorph and aquatic insect emergence for eight temporary ponds. We compared the relative magnitude of cross‐habitat biotic subsidies of temporary ponds to identify potentially important yet overlooked subsidies. Terrestrial insect inputs to ponds were the second largest subsidy (mean 15.3 g m−2 yr−1), exceeding combined emergence of amphibians and aquatic insects (mean 4.0 g m−2 yr−1), yet these high‐quality subsidies are generally unaccounted for in similar studies. Across the wetland complex, total amphibian emergence (8929.3 g yr−1) was nearly four times higher than total aquatic insect emergence (2491.9 g yr−1). Aquatic insect emergence was similar to that of lakes and streams while amphibian emergence was generally higher. Although larger ponds produced greater total fluxes to terrestrial habitats, smaller ponds were often more productive per unit area. Therefore, a mosaic of small ponds may produce greater or equivalent subsidies to terrestrial food webs than a single large pond. Given continued threats to temporary ponds and their connections to surrounding forests, management and restoration of these systems, as well as future studies, should take holistic approaches that account for the many aquatic–terrestrial linkages, and factors that influence them.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Reciprocal subsidies between temporary ponds and riparian forests

Fritz

Whiles

2021

Limnology & Oceanography

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“…Terrestrial invertebrates and fish prey can subsidise higher level consumers, representing an important resource budget with important biological benefits (growth and survival) for animal communities (e.g. Kawaguchi & Nakano, 2001; Mittelbach & Persson, 1998; Sánchez‐Hernández, 2020b). In addition, decreases in riparian arthropod inputs have an indirect effect on stream benthic communities by altering the intensity of fish predation in the food web, that is, predators increase the feeding on aquatic invertebrates which drives a subsequent increase in periphyton biomass via cascading trophic effects (Nakano et al, 1999).…”

Section: Historical Contextmentioning

confidence: 99%

“…However, terrestrial invertebrates, congeners (cannibalism) and fish prey (piscivory) are key food resource fuelling species at higher trophic levels (e.g. fish and salamanders) in riverine food webs (Kawaguchi & Nakano, 2001; Mittelbach & Persson, 1998; Sánchez‐Hernández, 2020b), which have not been considered into RRC principles.…”

Section: Promising Areas For Future Research: Integrating Trophic Eco...mentioning

confidence: 99%

Fresh perspectives on the River Continuum Concept require trophic ecology approaches focussed on food web structure and energy mobilisation routes

Sánchez‐Hernández

2023

Journal of Animal Ecology

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Stream‐dwelling communities are expected to show a gradual replacement of the dominant feeding types following the type of resources found along the river continuum. Yet, the underlying longitudinal gradients in food web structure and energy flow‐paths remain poorly understood. Here, I synthesise novel research on the River Continuum Concept (RCC) and identify promising areas for future research linked to longitudinal changes in food‐chain length and energy mobilisation routes. For example, feeding links and connectance should reach maximum values in mid‐order rivers and then decrease to river mouths following uncovered longitudinal diversity patterns. Regarding energy mobilisation routes, a gradual replacement in the food web fuelling between allochthonous (leaf litter) and autochthonous (periphyton) resources should be expected. Beyond longitudinal changes in primary basal resource to consumer paths, other allochthonous (e.g. riparian arthropod inputs) and autochthonous (e.g. fish prey) inputs subsidising higher level consumers may show longitudinal changes, that is, terrestrial invertebrates decreasing but piscivory increasing downstream. However, the role of these inputs, that can alter predator niche variation and have indirect community‐based effects, on both food web structure and energy flow‐paths along the river continuum is not clear yet. Incorporating energy mobilisation and food web structure into RCC principles is necessary for a broad understanding of ecosystem functioning and trophic diversity in riverine systems, driving the emergence of novel insights. How function and structure of riverine food webs adapt to longitudinal changes in physical and biological environments represent a challenge for next generation of stream ecologists.

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“…Amphibians play important roles, such as pest biological control in agricultural systems (Attademo et al, 2005;Khatiwada et al, 2016) and energy flow from aquatic to terrestrial habitats (Sánchez-Hernandez, 2020). Anuran species were found to differ in their sensibility within the field crops (Pyron, 2018).…”

Section: Introductionmentioning

confidence: 99%

Alterations in Gonads and Liver Tissue in Two Neotropical Anuran Species Commonly Occurring in Rice Fields Crops

Curi

Peltzer

Attademo

2021

Water Air Soil Pollut

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Amphibians find a suitable habitat in rice agroecosystems, but their viability is affected by the sublethal effects of agrochemicals. Animal condition, external morphology, and liver and male gonad tissue histology were examined on Lysapsus limellum and Rhinella bergi, common species that occurs in rice fields (RF) and reference sites (RS) from Santa Fe and Chaco provinces, Argentina, respectively. Animal condition factor showed no significant differences between environments in either species. Males of both species from RF showed asymmetrical testis size. A higher proportion of cysts with early spermatogenesis cell stages were observed in RF specimens than in RS individuals. The proportion of tubules with free spermatozoa differed between environments for L. limellum. Bidder organ presented vacuoles, atretic follicles, and pigmentary cells in R. bergi from Chaco RF. Liver tissues of both species from RF exhibited sinusoid enlargement, hypervascularization, hepatocyte vacuolization, and dilated blood vessels. R. bergi had a higher number of hepatic melanomacrophages in RF than in RS. The histological biomarker was more sensitive than the morphological one to evaluate chronic pesticide exposure using anuran non-target organs (liver, gonads) and Bidder organ. The potential effect of those alterations on the reproductive performance of anurans that commonly occur in agroecosystems needs further research.

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Reciprocal Role of Salamanders in Aquatic Energy Flow Pathways

Cited by 11 publications

References 107 publications

Reciprocal subsidies between temporary ponds and riparian forests

Reciprocal subsidies between temporary ponds and riparian forests

Fresh perspectives on the River Continuum Concept require trophic ecology approaches focussed on food web structure and energy mobilisation routes

Alterations in Gonads and Liver Tissue in Two Neotropical Anuran Species Commonly Occurring in Rice Fields Crops

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