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Inland blue holes of The Bahamas - chemistry and biology in a unique aquatic environment
Lund University, Aquatic Ecology, Department of Biology, Sweden.
Lund University, Aquatic Ecology, Department of Biology, Sweden.
Lund University, Aquatic Ecology, Department of Biology, Sweden.ORCID iD: 0000-0001-6177-8877
Lund University, Aquatic Ecology, Department of Biology, Sweden.
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2020 (English)In: Fundamental and Applied Limnology, ISSN 1863-9135, Vol. 194, no 2, p. 95-106Article in journal (Refereed) Published
Abstract [en]

While lake systems in temperate regions have been extensively studied, tropical and subtropical systems have received less attention. Here, we describe the water chemistry and biota of ten inland blue holes on Andros Island, The Bahamas, representative of the morphological, abiotic, and biotic variation among Androsian inland blue holes. The majority of the studied blue holes were vertically stratified with oxic freshwater overlying anoxic saline groundwater of marine origin. Water chemistry (e.g. total phosphorus and nitrogen) in shallow waters was similar among blue holes, while turbidity and water color varied. Presence of hydrogen sulfide and reduced iron in and below the halocline indicate reducing conditions in all stratified blue holes. The biota above the halocline was also similar among blue holes with a few taxa dominating the phytoplankton community, and the zooplankton community consisting of copepods and rotifers. The Bahamas mosquitofish (Gambusia hubbsi) was present in all investigated blue holes, often accompanied by other small planktivorous fish, while the piscivorous bigmouth sleeper (Gobiomorus donnitor) was only present in some of the blue holes. Our field study reinforces that inland blue holes are highly interesting for biogeochemical research, and provide naturally replicated systems for evolutionary studies.

Place, publisher, year, edition, pages
Schweizerbart science publishers , 2020. Vol. 194, no 2, p. 95-106
Keywords [en]
Andros Island, anchialine caves, redox biogeochemistry, halocline, sub-tropical, aquatic ecosystems
National Category
Ecology
Research subject
Ecological Modelling Group
Identifiers
URN: urn:nbn:se:his:diva-19395DOI: 10.1127/fal/2020/1330ISI: 000599170300003Scopus ID: 2-s2.0-85094855103OAI: oai:DiVA.org:his-19395DiVA, id: diva2:1518346
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Available from: 2021-01-15 Created: 2021-01-15 Last updated: 2021-08-31Bibliographically approved

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Ekelund Ugge, Gustaf

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