Passive Recovery Risks Non-native Vegetation Invasion Following Intensive Herbivory by Canada Geese in Two Salish Sea Estuaries.
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| Title: | Passive Recovery Risks Non-native Vegetation Invasion Following Intensive Herbivory by Canada Geese in Two Salish Sea Estuaries. |
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| Authors: | Lane, Stefanie L.1 (AUTHOR) stefanielane@gmail.com, Shackelford, Nancy2 (AUTHOR), Martin, Tara G.1 (AUTHOR) |
| Source: | Estuaries & Coasts. Dec2024, Vol. 47 Issue 8, p2160-2173. 14p. |
| Subject Terms: | *Salt marsh plants, *Nature reserves, *Canada goose, *Ground vegetation cover, *Plant communities, *Salt marshes |
| Abstract: | Tidal marsh plant communities in the Pacific Northwest are characterized by tall, perennial graminoids (TPGs), which provide forage for herbivores such as Canada geese. Excessive grazing by Canada geese leads to loss of marsh habitat, and removal of grazing pressure is required for the vegetation to recover. Grazing exclosures (fences) are used to allow time and space for vegetation to recover following intensive herbivory; however, their effects on native plant community recovery has not been tested. Generalized linear models were used to compare TPG abundance in aboveground vegetation and surface seed banks in 1-year-old and 10-year-old exclosures at Nanaimo River Estuary (NRE) and Little Qualicum River Estuary (LQRE), respectively, to areas of the marshes that had no known history of grazing (undisturbed) and areas still actively grazed (grubbed). Compared to undisturbed sites, grubbed sites had 187.3% less mean TPG vegetation cover and 190.7% lower proportion of TPG seeds. The 1-year-old exclosures at NRE had 105.0% less mean TPG vegetation cover and 193.2% lower proportion of TPG seeds. The 10-year-old exclosures at LQRE had 7.0% greater mean TPG cover and 55.7% greater proportion of TPG seed than all undisturbed sites; however, these exclosures had 110.0% greater mean relative abundance of non-native TPGs than undisturbed sites. These results indicate vegetation may not recover towards comparable historic conditions through grazing exclusion alone, and that active restoration methods may be required following intensive grazing, especially in estuaries where the vegetation community and surface seed bank has a high abundance of non-native, invasive species. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 180253614 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Passive Recovery Risks Non-native Vegetation Invasion Following Intensive Herbivory by Canada Geese in Two Salish Sea Estuaries. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Lane%2C+Stefanie+L%2E%22">Lane, Stefanie L.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> stefanielane@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Shackelford%2C+Nancy%22">Shackelford, Nancy</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Martin%2C+Tara+G%2E%22">Martin, Tara G.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Estuaries+%26+Coasts%22">Estuaries & Coasts</searchLink>. Dec2024, Vol. 47 Issue 8, p2160-2173. 14p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Salt+marsh+plants%22">Salt marsh plants</searchLink><br />*<searchLink fieldCode="DE" term="%22Nature+reserves%22">Nature reserves</searchLink><br />*<searchLink fieldCode="DE" term="%22Canada+goose%22">Canada goose</searchLink><br />*<searchLink fieldCode="DE" term="%22Ground+vegetation+cover%22">Ground vegetation cover</searchLink><br />*<searchLink fieldCode="DE" term="%22Plant+communities%22">Plant communities</searchLink><br />*<searchLink fieldCode="DE" term="%22Salt+marshes%22">Salt marshes</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Tidal marsh plant communities in the Pacific Northwest are characterized by tall, perennial graminoids (TPGs), which provide forage for herbivores such as Canada geese. Excessive grazing by Canada geese leads to loss of marsh habitat, and removal of grazing pressure is required for the vegetation to recover. Grazing exclosures (fences) are used to allow time and space for vegetation to recover following intensive herbivory; however, their effects on native plant community recovery has not been tested. Generalized linear models were used to compare TPG abundance in aboveground vegetation and surface seed banks in 1-year-old and 10-year-old exclosures at Nanaimo River Estuary (NRE) and Little Qualicum River Estuary (LQRE), respectively, to areas of the marshes that had no known history of grazing (undisturbed) and areas still actively grazed (grubbed). Compared to undisturbed sites, grubbed sites had 187.3% less mean TPG vegetation cover and 190.7% lower proportion of TPG seeds. The 1-year-old exclosures at NRE had 105.0% less mean TPG vegetation cover and 193.2% lower proportion of TPG seeds. The 10-year-old exclosures at LQRE had 7.0% greater mean TPG cover and 55.7% greater proportion of TPG seed than all undisturbed sites; however, these exclosures had 110.0% greater mean relative abundance of non-native TPGs than undisturbed sites. These results indicate vegetation may not recover towards comparable historic conditions through grazing exclusion alone, and that active restoration methods may be required following intensive grazing, especially in estuaries where the vegetation community and surface seed bank has a high abundance of non-native, invasive species. [ABSTRACT FROM AUTHOR] |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s12237-024-01419-7 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 2160 Subjects: – SubjectFull: Salt marsh plants Type: general – SubjectFull: Nature reserves Type: general – SubjectFull: Canada goose Type: general – SubjectFull: Ground vegetation cover Type: general – SubjectFull: Plant communities Type: general – SubjectFull: Salt marshes Type: general Titles: – TitleFull: Passive Recovery Risks Non-native Vegetation Invasion Following Intensive Herbivory by Canada Geese in Two Salish Sea Estuaries. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Lane, Stefanie L. – PersonEntity: Name: NameFull: Shackelford, Nancy – PersonEntity: Name: NameFull: Martin, Tara G. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 15592723 Numbering: – Type: volume Value: 47 – Type: issue Value: 8 Titles: – TitleFull: Estuaries & Coasts Type: main |
| ResultId | 1 |
