Population trends of colonial waterbirds nesting in Hamilton Harbour in relation to changes in habitat and management
Since 1975, the diversity and abundance of colonial waterbirds breeding in Hamilton Harbour have increased, making it an important nesting site on the Great Lakes. An adaptive management approach has been employed to control hyper-abundant species and guide conservation efforts for vulnerable specie...
Main Authors: | , , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
Taylor & Francis
2016
|
Subjects: | |
Online Access: | https://dx.doi.org/10.6084/m9.figshare.3179950.v1 https://figshare.com/articles/Population_trends_of_colonial_waterbirds_nesting_in_Hamilton_Harbour_in_relation_to_changes_in_habitat_and_management/3179950/1 |
id |
ftdatacite:10.6084/m9.figshare.3179950.v1 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.6084/m9.figshare.3179950.v1 2023-05-15T18:27:25+02:00 Population trends of colonial waterbirds nesting in Hamilton Harbour in relation to changes in habitat and management Zanchetta, Carolyn V. Moore, David J. D. V. Chip Weseloh Quinn, James S. 2016 https://dx.doi.org/10.6084/m9.figshare.3179950.v1 https://figshare.com/articles/Population_trends_of_colonial_waterbirds_nesting_in_Hamilton_Harbour_in_relation_to_changes_in_habitat_and_management/3179950/1 unknown Taylor & Francis https://dx.doi.org/10.1080/14634988.2016.1172834 https://dx.doi.org/10.6084/m9.figshare.3179950 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Evolutionary Biology FOS Biological sciences Ecology 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences Plant Biology Text article-journal Journal contribution ScholarlyArticle 2016 ftdatacite https://doi.org/10.6084/m9.figshare.3179950.v1 https://doi.org/10.1080/14634988.2016.1172834 https://doi.org/10.6084/m9.figshare.3179950 2021-11-05T12:55:41Z Since 1975, the diversity and abundance of colonial waterbirds breeding in Hamilton Harbour have increased, making it an important nesting site on the Great Lakes. An adaptive management approach has been employed to control hyper-abundant species and guide conservation efforts for vulnerable species, with the goal of maintaining a diverse waterbird community. Four species exhibited increasing or stable population trends (1975–2013): Double-crested Cormorants ( Phalacrocorax auritus from 0 to 4747 nests); Black-crowned Night-Herons ( Nycticorax nycticorax ranged from 6 to 259 nests); Herring Gulls ( Larus argentatus from 0 to 244 nests); and Caspian Terns ( Hydroprogne caspia from 0 to 496 nests). Cormorants are currently above (2,500 nests), while Caspian Terns (400–600 nests), Night-Herons (100–200 nests) and Herring Gulls (200–300 nests) are within population targets set out in the Hamilton Harbour Remedial Action Plan. Despite conservation efforts, Common Terns ( Sterna hirundo ) declined from a peak of 1,028 nests (1990) to 333 nests (2013), although currently within the population target (300–600 nests). Ring-billed Gulls ( L. delawarensis ), through long-term management and habitat restrictions, were reduced from a peak of 39,621 nests (1990) to 11,133 nests (2013), but still exceed the target (<10,000 nests). Changes in the amount of available habitat have affected waterbird distributions: the loss of 42 ha (peak in 1999) of former nesting areas to development has been partially offset by the creation or securement of 1.9 ha of dedicated breeding habitat. Continued management, assessed and refined annually, is required to maintain species diversity in the area. Current management techniques focus on preventing Ring-billed Gulls from nesting on private lands and dedicated Tern nesting habitat, excluding Cormorants from nesting at specific sites, and reducing inter-specific competition with Night-Herons and Herring Gulls. Recommendations and considerations regarding future management and conservation efforts to reach Remedial Action Plan targets in the harbor are outlined. Text Sterna hirundo DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Evolutionary Biology FOS Biological sciences Ecology 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences Plant Biology |
spellingShingle |
Evolutionary Biology FOS Biological sciences Ecology 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences Plant Biology Zanchetta, Carolyn V. Moore, David J. D. V. Chip Weseloh Quinn, James S. Population trends of colonial waterbirds nesting in Hamilton Harbour in relation to changes in habitat and management |
topic_facet |
Evolutionary Biology FOS Biological sciences Ecology 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences Plant Biology |
description |
Since 1975, the diversity and abundance of colonial waterbirds breeding in Hamilton Harbour have increased, making it an important nesting site on the Great Lakes. An adaptive management approach has been employed to control hyper-abundant species and guide conservation efforts for vulnerable species, with the goal of maintaining a diverse waterbird community. Four species exhibited increasing or stable population trends (1975–2013): Double-crested Cormorants ( Phalacrocorax auritus from 0 to 4747 nests); Black-crowned Night-Herons ( Nycticorax nycticorax ranged from 6 to 259 nests); Herring Gulls ( Larus argentatus from 0 to 244 nests); and Caspian Terns ( Hydroprogne caspia from 0 to 496 nests). Cormorants are currently above (2,500 nests), while Caspian Terns (400–600 nests), Night-Herons (100–200 nests) and Herring Gulls (200–300 nests) are within population targets set out in the Hamilton Harbour Remedial Action Plan. Despite conservation efforts, Common Terns ( Sterna hirundo ) declined from a peak of 1,028 nests (1990) to 333 nests (2013), although currently within the population target (300–600 nests). Ring-billed Gulls ( L. delawarensis ), through long-term management and habitat restrictions, were reduced from a peak of 39,621 nests (1990) to 11,133 nests (2013), but still exceed the target (<10,000 nests). Changes in the amount of available habitat have affected waterbird distributions: the loss of 42 ha (peak in 1999) of former nesting areas to development has been partially offset by the creation or securement of 1.9 ha of dedicated breeding habitat. Continued management, assessed and refined annually, is required to maintain species diversity in the area. Current management techniques focus on preventing Ring-billed Gulls from nesting on private lands and dedicated Tern nesting habitat, excluding Cormorants from nesting at specific sites, and reducing inter-specific competition with Night-Herons and Herring Gulls. Recommendations and considerations regarding future management and conservation efforts to reach Remedial Action Plan targets in the harbor are outlined. |
format |
Text |
author |
Zanchetta, Carolyn V. Moore, David J. D. V. Chip Weseloh Quinn, James S. |
author_facet |
Zanchetta, Carolyn V. Moore, David J. D. V. Chip Weseloh Quinn, James S. |
author_sort |
Zanchetta, Carolyn V. |
title |
Population trends of colonial waterbirds nesting in Hamilton Harbour in relation to changes in habitat and management |
title_short |
Population trends of colonial waterbirds nesting in Hamilton Harbour in relation to changes in habitat and management |
title_full |
Population trends of colonial waterbirds nesting in Hamilton Harbour in relation to changes in habitat and management |
title_fullStr |
Population trends of colonial waterbirds nesting in Hamilton Harbour in relation to changes in habitat and management |
title_full_unstemmed |
Population trends of colonial waterbirds nesting in Hamilton Harbour in relation to changes in habitat and management |
title_sort |
population trends of colonial waterbirds nesting in hamilton harbour in relation to changes in habitat and management |
publisher |
Taylor & Francis |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3179950.v1 https://figshare.com/articles/Population_trends_of_colonial_waterbirds_nesting_in_Hamilton_Harbour_in_relation_to_changes_in_habitat_and_management/3179950/1 |
genre |
Sterna hirundo |
genre_facet |
Sterna hirundo |
op_relation |
https://dx.doi.org/10.1080/14634988.2016.1172834 https://dx.doi.org/10.6084/m9.figshare.3179950 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.3179950.v1 https://doi.org/10.1080/14634988.2016.1172834 https://doi.org/10.6084/m9.figshare.3179950 |
_version_ |
1766209514811424768 |