Winter is cool: spatio-temporal patterns of the squat lobster Munida gregaria and the Fuegian sprat Sprattus fuegensis in a sub-Antarctic estuarine environment

Diez, Mariano J.; Cabreira, Ariel G.; Madirolas, Adrián; Nascimento, Jacobo Martín de; Scioscia, Gabriela; Schiavini, Adrián; Lovrich, Gustavo A.

doi:10.1007/s00300-018-2394-2

Cited by 41 publications

(26 citation statements)

References 52 publications

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“…Given the high mobility and generalist diet of many fishes, spatial and temporal niche partitioning likely operate in tandem. For example, mobile aquatic taxa shift their habitat seasonally in response to changes in temperature and prey density (Holbrook & Schmitt ; Diez et al ) or select for prey types not shared by their competitors during each season (Amundsen & Knudsen ; Hayden et al ). Even in our case studies, competing species pairs diverge not only in their annual patterns of activity but also their habitat use (Box 1, 2).…”

Section: A Case For Multiple Coexistence Mechanismsmentioning

confidence: 99%

Winter in water: differential responses and the maintenance of biodiversity

et al. 2020

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The ecological consequences of winter in freshwater systems are an understudied but rapidly emerging research area. Here, we argue that winter periods of reduced temperature and light (and potentially oxygen and resources) could play an underappreciated role in mediating the coexistence of species. This may be especially true for temperate and subarctic lakes, where seasonal changes in the thermal environment might fundamentally structure species interactions. With climate change already shortening ice-covered periods on temperate and polar lakes, consideration of how winter conditions shape biotic interactions is urgently needed. Using freshwater fishes in northern temperate lakes as a case study, we demonstrate how physiological trait differences (e.g. thermal preference, light sensitivity) drive differential behavioural responses to winter among competing species. Specifically, some species have a higher capacity for winter activity than others. Existing and new theory is presented to argue that such differential responses to winter can promote species coexistence. Importantly, if winter is a driver of niche differences that weaken competition between, relative to within species, then shrinking winter periods could threaten coexistence by tipping the scales in favour of certain sets of species over others.

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Section: A Case For Multiple Coexistence Mechanismsmentioning

confidence: 99%

Winter in water: differential responses and the maintenance of biodiversity

et al. 2020

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“…Given the high mobility and generalist diet of many fishes, spatial and temporal niche partitioning likely operate in tandem. For example, mobile aquatic taxa shift their habitat seasonally in response to changes in temperature and prey density (Diez et al 2018;Holbrook and Schmitt 1989) or select for prey types not shared by their competitors during each season (Amundsen & Knudsen 2009;Hayden et al 2015). Even in our case studies, competing species pairs diverge in their annual patterns of activity but also their habitat use (Box 1, 2).…”

Section: A Case For Multiple Coexistence Mechanismsmentioning

confidence: 91%

Winter in water: Differential responses and the maintenance of biodiversity

McMeans

McCann

Guzzo

et al. 2019

Preprint

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The ecological consequences of winter in freshwater systems are an understudied but rapidly emerging research area. Here, we argue that winter periods of reduced temperature and light (and potentially oxygen and resources) could play an underappreciated role in mediating the coexistence of species. This may be especially true for temperate and subarctic lakes, where seasonal changes in the thermal environment might fundamentally structure species interactions. With climate change already shortening ice-covered periods on temperate and polar lakes, consideration of how winter conditions shape biotic interactions is urgently needed. Using freshwater fishes in northern temperate lakes as a case study, we demonstrate how physiological trait differences (e.g., thermal preference, light sensitivity) drive differential behavioral responses to winter among competing species. Specifically, some species have a higher capacity for winter activity than others. Existing and new theory is presented to argue that such differential responses to winter can promote species coexistence. Importantly, if winter is a driver of niche differences that weaken competition between relative to within species, then shrinking winter periods could threaten coexistence by tipping the scales in favor of certain sets of species over others.

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“…In our study case, the Fuegian sprat constitutes the only pelagic species with abundances high enough to be considered the most important species in the trophodynamics of CA and BC (Sánchez et al 1995, Madirolas et al 2000, Sabatini et al 2004, Diez et al 2018. In addition, it is an important prey item for many top marine predators in the region (e.g.…”

Section: Ww Speciesmentioning

confidence: 99%

“…Fuegian sprat Sprattus fuegensis and longtail southern cod Patagonotothen ramsayi) have been proposed as WW species in previous studies (e.g. Padovani et al 2012, Arkhipkin & Laptikhovsky 2013, Diez et al 2018. These species fulfill several criteria to be considered WW species, including: (1) they are species with high regional abundances (Madirolas et al 2000, Padovani et al 2012, Arkhipkin & Laptikhovsky 2013, (2) they seem to occupy low to mid-trophic positions (TPs) in food webs (Ciancio et al 2008, Riccialdelli et al 2010), (3) many predators feed on them (Raya Rey et al 2007, Riccialdelli et al 2010, Scioscia et al 2014, and (4) the population dynamics of these species appear to depend on the environment (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…These species fulfill several criteria to be considered WW species, including: (1) they are species with high regional abundances (Madirolas et al 2000, Padovani et al 2012, Arkhipkin & Laptikhovsky 2013, (2) they seem to occupy low to mid-trophic positions (TPs) in food webs (Ciancio et al 2008, Riccialdelli et al 2010), (3) many predators feed on them (Raya Rey et al 2007, Riccialdelli et al 2010, Scioscia et al 2014, and (4) the population dynamics of these species appear to depend on the environment (e.g. climatic variations) (Diez et al 2016(Diez et al , 2018. There is a need for better identification of WW species as an essential functional trophic group to improve food-web models, but particularly for conservation purposes.…”

Section: Introductionmentioning

confidence: 99%

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Trophic structure of southern marine ecosystems: a comparative isotopic analysis from the Beagle Channel to the oceanic Burdwood Bank area under a wasp-waist assumption

Riccialdelli

Becker

Fioramonti

et al. 2020

Mar. Ecol. Prog. Ser.

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Understanding the structure and functioning of marine ecosystems has become a critical issue to assess the potential short- and long-term effects of natural and anthropogenic impacts and to determine the knowledge needed to conduct appropriate conservation actions. This goal can be achieved in part by acquiring more detailed food web information and evaluating the processes that shape food web structure and dynamics. Our main objective was to identify large-scale patterns in the organization of pelagic food webs that can be linked to a wasp-waist (WW) structure, proposed for the southwestern South Atlantic Ocean. We evaluated 3 sub-Antarctic marine areas in a regional context: the Beagle Channel (BC), the Atlantic coast of Tierra del Fuego (CA) and the oceanic Burdwood Bank area (BB). We used carbon and nitrogen isotopic information of all functional trophic groups, ranging from primary producers to top predators, and analyzed them through stable isotope-based Bayesian analyses. We found that BC and BB have a more pronounced WW structure compared to CA. We identified species at mid to low trophic positions that play a key role in the trophodynamics of each marine area (e.g. Fuegian sprat Sprattus fuegensis, longtail southern cod Patagonotothen ramsayi and squat lobster Munida gregaria) and considered them as the most plausible WW species. The identification of the most influential species within food webs has become a crucial task for conservation purposes in local and regional contexts to maintain ecosystem integrity and the supply of ecosystem services for the southwestern South Atlantic Ocean.

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Winter is cool: spatio-temporal patterns of the squat lobster Munida gregaria and the Fuegian sprat Sprattus fuegensis in a sub-Antarctic estuarine environment

Cited by 41 publications

References 52 publications

Winter in water: differential responses and the maintenance of biodiversity

Winter in water: differential responses and the maintenance of biodiversity

Winter in water: Differential responses and the maintenance of biodiversity

Trophic structure of southern marine ecosystems: a comparative isotopic analysis from the Beagle Channel to the oceanic Burdwood Bank area under a wasp-waist assumption

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