Decomposition Rates of Purple Loosestrife (Lythrum salicaria) and Lyngbyei's Sedge (Carex lyngbyei) in the Fraser River Estuary
Using litter bag experiments in the Fraser River estuary in British Columbia, we tested for differences in the relatice decomposition rates between leaves of purple loosestrife (Lythrum salicaria), an introduced exotic and a native sedge (Carex lynbyei). The findings have implications for habitat management because purple loosestrife has recently invaded estuaries of the northeast Pacific and may be outcompeting native sedges important in detrital-based food webs.
Simple
- Date (Publication)
- 2019-03
- Responsable
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Nom de l'organisation Nom de la personne Adresse e-mail Rôle DFO
Colin Levings
Point de recherche J.A. Grout
Point de recherche J.S. Richardson
Point de recherche
- Forme de la présentation
- Document numérique
- But
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Our study on decomposition rates of L. Salicaria in the Fraser River and estuary gives the first available data for this introduced exotic from an estuarine or large lotic system. We estimated the decomposition rates of leaf material from the two species using a litter bag technique. We also investigated differences in decomposition between locations within the estuary, and conducted a preliminary study of colonization of the detritus by invertebrates. Other than the preliminary work by Moody (1978) and Kistritz and Yesaki (1979), there are no estimates of the decomposition rate of sedges in Pacific estuaries.
- Etat
- Finalisé
- Fréquence de mise à jour
- Non planifiée
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Global Change Master Directory (GCMD) Science Keywords v15.9
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Earth Science > Biological Classification > Plants > Angiosperms (flowering Plants)
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Earth Science > Biosphere > Aquatic Ecosystems > Estuarine Habitat
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DFO Areas
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North Pacific Ocean > Fraser River and BC Interior
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- Langue de la ressource
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English
- Encodage des caractères
- Utf8
- Catégorie ISO
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- Biologie, faune et flore
- Description de l'environnement de travail
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867 KB
- Description
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Fraser River estuary in British Columbia
))
- Début
- 1993-10
- Fin
- 1993-10
- Informations supplémentaires
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Using litter bag experiments in the Fraser River estuary in British Columbia, we tested for differences in the relatice decomposition rates between leaves of purple loosestrife (Lythrum salicaria), an introduced exotic and a native sedge (Carex lynbyei). The difference in the mean decay rate coefficient for the two species was significantly different (p<0.01) and the coefficient for purple loostrife (0.0110 d-1) was nearly four times higher than for Lyngbyei’s sedge (0.0028 d-1). This is the first estimate of the decay rate coefficient for purple loosestrife from an estuary. The rapid decay rate of loosestrife leaves suggests that they supply detritus to the ecosystem in autumn whereas the much slower decay rate of sedge implies that it supplies detritus throughout the winter and early spring. Consumer organisms important in juvenile salmon food webs appear to be adapted to take advantage of the detritus provided in these seasons. The findings have implications for habitat management because purple loosestrife has recently invaded estuaries of the northeast Pacific and may be outcompeting native sedges important in detrital-based food webs.
- Format (encodage)
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Nom Version electronic
none
- Contact
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Nom de l'organisation Nom de la personne Adresse e-mail Rôle Pacific Salmon Foundation
Isobel Pearsall
Distributeur
- Ressource en ligne
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Protocole Adresse Internet Nom WWW:LINK-1.0-http--link
https://www.dfo-mpo.gc.ca/science/data-donnees/index-eng.html DFO Science website
WWW:DOWNLOAD-1.0-http--download
https://soggy2.zoology.ubc.ca/geonetwork/srv/api/records/fafb7b9e-6724-4b29-903a-3b3ae6b378c1/attachments/fafb7b9e-6724-4b29-903a-3b3ae6b378c1.pdf fafb7b9e-6724-4b29-903a-3b3ae6b378c1.pdf WWW:DOWNLOAD-1.0-http--download
https://soggy2.zoology.ubc.ca/geonetwork/srv/api/records/fafb7b9e-6724-4b29-903a-3b3ae6b378c1/attachments/fafb7b9e-6724-4b29-903a-3b3ae6b378c1.xlsx fafb7b9e-6724-4b29-903a-3b3ae6b378c1.xlsx
- Niveau
- Jeu de données
- Généralités sur la provenance
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Levings produced paper copy. Fraser scanned with Fujitsu Scansnap s1500 (ABBY Finereader OCR software). Data was extracted through Adobe Reader conversion and manual entry into MS Excel.
Métadonnées
- Identifiant de la fiche
- fafb7b9e-6724-4b29-903a-3b3ae6b378c1 XML
- Langue
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eng
- Jeu de caractères
- Utf8
- Type de ressource
- Jeu de données
- Date des métadonnées
- 2023-12-19T00:20:40.733Z
- Nom du standard de métadonnées
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North American Profile of ISO19115:2003 - Geographic information - Metadata
- Version du standard de métadonnées
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NAP - CAN/CGSB-171.100-2009
- Contact
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Nom de l'organisation Nom de la personne Adresse e-mail Rôle Pacific Salmon Foundation
Sarah Fraser
Auteur
- Autre langue
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LanguageCode CharacterEncoding Français Utf8 Anglais Utf8
Aperçus
Étendue spatiale
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