Relationships between breeding waterbird abundance, diversity, and clear water status after the restoration of two shallow nutrient-rich Danish lakes

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Relationships between breeding waterbird abundance, diversity, and clear water status after the restoration of two shallow nutrient-rich Danish lakes. / Fox, Anthony David; Jørgensen, Hans E; Jeppesen, Erik; Lauridsen, Torben Linding; Søndergaard, Martin; Fugl, Karsten; Myssen, Palle; Balsby, Thorsten Johannes Skovbjerg; Clausen, Preben.

In: Aquatic Conservation (Online), Vol. 30, No. 2, 2020, p. 237-245.

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@article{b9faebae207741d0877a4aa8673c52b5,
title = "Relationships between breeding waterbird abundance, diversity, and clear water status after the restoration of two shallow nutrient-rich Danish lakes",
abstract = "Breeding waterbird communities have suffered globally from the effects of anthropogenic changes in water quality (especially nutrient enrichment) in recent decades, but few studies have demonstrated the positive effects of restorative actions. Annual breeding waterbird surveys in the period 1977–2005 at two restored southern Danish lake basins (combining nutrient load reduction and biomanipulation) showed an up to five-fold increase in abundance, and considerable changes in species richness and diversity, following restoration to clear water status in both lakes. Parallel surveys at a third lake, which retained clear water quality throughout, offering a form of natural {\textquoteleft}control{\textquoteright}, showed no such changes over the same time period. Consistent relationships between breeding waterbird abundance, species richness, and diversity with measures of water clarity (Secchi disc depth, chlorophyll a, and suspended matter) suggest that water clarity mainly drives the relationship; inverse relationships between these measures and total nitrogen and phosphorus were less consistent than for water clarity. The results suggest that an improvement in water clarity plays a key role in restoring breeding waterbird communities and suggest that breeding waterbirds can be indicators of the success of lake restoration projects, but more studies are needed to confirm their wider utility under a variety of conditions.",
keywords = "biodiversity, birds, lake, nutrient enrichment",
author = "Fox, {Anthony David} and J{\o}rgensen, {Hans E} and Erik Jeppesen and Lauridsen, {Torben Linding} and Martin S{\o}ndergaard and Karsten Fugl and Palle Myssen and Balsby, {Thorsten Johannes Skovbjerg} and Preben Clausen",
year = "2020",
doi = "10.1002/aqc.3260",
language = "English",
volume = "30",
pages = "237--245",
journal = "Aquatic Conservation (Online)",
issn = "1099-0755",
publisher = "John Wiley Sons Ltd",
number = "2",

}

RIS

TY - JOUR

T1 - Relationships between breeding waterbird abundance, diversity, and clear water status after the restoration of two shallow nutrient-rich Danish lakes

AU - Fox, Anthony David

AU - Jørgensen, Hans E

AU - Jeppesen, Erik

AU - Lauridsen, Torben Linding

AU - Søndergaard, Martin

AU - Fugl, Karsten

AU - Myssen, Palle

AU - Balsby, Thorsten Johannes Skovbjerg

AU - Clausen, Preben

PY - 2020

Y1 - 2020

N2 - Breeding waterbird communities have suffered globally from the effects of anthropogenic changes in water quality (especially nutrient enrichment) in recent decades, but few studies have demonstrated the positive effects of restorative actions. Annual breeding waterbird surveys in the period 1977–2005 at two restored southern Danish lake basins (combining nutrient load reduction and biomanipulation) showed an up to five-fold increase in abundance, and considerable changes in species richness and diversity, following restoration to clear water status in both lakes. Parallel surveys at a third lake, which retained clear water quality throughout, offering a form of natural ‘control’, showed no such changes over the same time period. Consistent relationships between breeding waterbird abundance, species richness, and diversity with measures of water clarity (Secchi disc depth, chlorophyll a, and suspended matter) suggest that water clarity mainly drives the relationship; inverse relationships between these measures and total nitrogen and phosphorus were less consistent than for water clarity. The results suggest that an improvement in water clarity plays a key role in restoring breeding waterbird communities and suggest that breeding waterbirds can be indicators of the success of lake restoration projects, but more studies are needed to confirm their wider utility under a variety of conditions.

AB - Breeding waterbird communities have suffered globally from the effects of anthropogenic changes in water quality (especially nutrient enrichment) in recent decades, but few studies have demonstrated the positive effects of restorative actions. Annual breeding waterbird surveys in the period 1977–2005 at two restored southern Danish lake basins (combining nutrient load reduction and biomanipulation) showed an up to five-fold increase in abundance, and considerable changes in species richness and diversity, following restoration to clear water status in both lakes. Parallel surveys at a third lake, which retained clear water quality throughout, offering a form of natural ‘control’, showed no such changes over the same time period. Consistent relationships between breeding waterbird abundance, species richness, and diversity with measures of water clarity (Secchi disc depth, chlorophyll a, and suspended matter) suggest that water clarity mainly drives the relationship; inverse relationships between these measures and total nitrogen and phosphorus were less consistent than for water clarity. The results suggest that an improvement in water clarity plays a key role in restoring breeding waterbird communities and suggest that breeding waterbirds can be indicators of the success of lake restoration projects, but more studies are needed to confirm their wider utility under a variety of conditions.

KW - biodiversity

KW - birds

KW - lake

KW - nutrient enrichment

U2 - 10.1002/aqc.3260

DO - 10.1002/aqc.3260

M3 - Journal article

VL - 30

SP - 237

EP - 245

JO - Aquatic Conservation (Online)

JF - Aquatic Conservation (Online)

SN - 1099-0755

IS - 2

ER -