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Erik Jeppesen

Local and regional variability in fish community structure, richness and diversity of 56 Danish lakes with contrasting depth and trophic state

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Local and regional variability in fish community structure, richness and diversity of 56 Danish lakes with contrasting depth and trophic state. / Menezes, Rosemberg; Borchsenius, Finn; Svenning, J.-C.; Søndergaard, Martin; Lauridsen, Torben Linding; Landkildehus, Frank; Jeppesen, Erik.

2011. Abstract from Brazilian Meeting of Limnology, Natal, Brazil.

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

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Menezes, Rosemberg et al. Local and regional variability in fish community structure, richness and diversity of 56 Danish lakes with contrasting depth and trophic state. Brazilian Meeting of Limnology, 04 Sep 2011, Natal, Brazil, Conference abstract for conference, 2011.

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@conference{e1d966a32f0c4ab09b1e47224128aa2c,
title = "Local and regional variability in fish community structure, richness and diversity of 56 Danish lakes with contrasting depth and trophic state",
abstract = "Habitat distribution of fish might be influenced by food availability, competition, predation,composition of aquatic plants and water clarity. It has been found that a shift from a turbid to a clear water state in a lake lead to higher proportion of piscivorous fish and a habitat shift of prey fish determined by a higher risk of predation in the littoral and upper pelagic zones. In Danish lakes, key species such as roach, perch and ruffe have shown a shift towards a more pelagic/profundal distribution in response to reduced nutrient loading, whereas bream and pikeperch remain in the pelagic/profundal zones. Nevertheless, information about how the within-lake variability in fish abundance, richness and diversity changes in the littoral and pelagic areas along contrasting depth and trophic state is scarce. It is expected that eutrophic lakes present lower within lake habit heterogeneity than oligotrophic lakes due to high turbidity leading to loss of submerged macrophytes and thus habitat variability. Also the influence of piscivorous birds on the fish distribution in the littoral zone may differ between lake types leading to a more homogeneous distribution along the littoral area in eutrophic lakes because visually-oriented predation are reduced due to the low water transparency. In the presentation we will discuss the results obtained with special emphasis on the variability in numbers and biomass of the key fish species between the near shore and the pelagic zone of 56 lakes using electrofishing and gill net data from the Danish NOVANA monitoring program conducted between 1989 and 2003.",
author = "Rosemberg Menezes and Finn Borchsenius and J.-C. Svenning and Martin S{\o}ndergaard and Lauridsen, {Torben Linding} and Frank Landkildehus and Erik Jeppesen",
year = "2011",
language = "English",
note = "Brazilian Meeting of Limnology : Science and Management of Inland Waters in a Changing World ; Conference date: 04-09-2011 Through 08-09-2011",

}

RIS

TY - ABST

T1 - Local and regional variability in fish community structure, richness and diversity of 56 Danish lakes with contrasting depth and trophic state

AU - Menezes, Rosemberg

AU - Borchsenius, Finn

AU - Svenning, J.-C.

AU - Søndergaard, Martin

AU - Lauridsen, Torben Linding

AU - Landkildehus, Frank

AU - Jeppesen, Erik

N1 - Conference code: XIII

PY - 2011

Y1 - 2011

N2 - Habitat distribution of fish might be influenced by food availability, competition, predation,composition of aquatic plants and water clarity. It has been found that a shift from a turbid to a clear water state in a lake lead to higher proportion of piscivorous fish and a habitat shift of prey fish determined by a higher risk of predation in the littoral and upper pelagic zones. In Danish lakes, key species such as roach, perch and ruffe have shown a shift towards a more pelagic/profundal distribution in response to reduced nutrient loading, whereas bream and pikeperch remain in the pelagic/profundal zones. Nevertheless, information about how the within-lake variability in fish abundance, richness and diversity changes in the littoral and pelagic areas along contrasting depth and trophic state is scarce. It is expected that eutrophic lakes present lower within lake habit heterogeneity than oligotrophic lakes due to high turbidity leading to loss of submerged macrophytes and thus habitat variability. Also the influence of piscivorous birds on the fish distribution in the littoral zone may differ between lake types leading to a more homogeneous distribution along the littoral area in eutrophic lakes because visually-oriented predation are reduced due to the low water transparency. In the presentation we will discuss the results obtained with special emphasis on the variability in numbers and biomass of the key fish species between the near shore and the pelagic zone of 56 lakes using electrofishing and gill net data from the Danish NOVANA monitoring program conducted between 1989 and 2003.

AB - Habitat distribution of fish might be influenced by food availability, competition, predation,composition of aquatic plants and water clarity. It has been found that a shift from a turbid to a clear water state in a lake lead to higher proportion of piscivorous fish and a habitat shift of prey fish determined by a higher risk of predation in the littoral and upper pelagic zones. In Danish lakes, key species such as roach, perch and ruffe have shown a shift towards a more pelagic/profundal distribution in response to reduced nutrient loading, whereas bream and pikeperch remain in the pelagic/profundal zones. Nevertheless, information about how the within-lake variability in fish abundance, richness and diversity changes in the littoral and pelagic areas along contrasting depth and trophic state is scarce. It is expected that eutrophic lakes present lower within lake habit heterogeneity than oligotrophic lakes due to high turbidity leading to loss of submerged macrophytes and thus habitat variability. Also the influence of piscivorous birds on the fish distribution in the littoral zone may differ between lake types leading to a more homogeneous distribution along the littoral area in eutrophic lakes because visually-oriented predation are reduced due to the low water transparency. In the presentation we will discuss the results obtained with special emphasis on the variability in numbers and biomass of the key fish species between the near shore and the pelagic zone of 56 lakes using electrofishing and gill net data from the Danish NOVANA monitoring program conducted between 1989 and 2003.

M3 - Conference abstract for conference

T2 - Brazilian Meeting of Limnology

Y2 - 4 September 2011 through 8 September 2011

ER -