دورية أكاديمية
أعرض في EDS

Dissolution of calcite in the twilight zone: bacterial control of dissolution of sinking planktonic carbonates is unlikely.

التفاصيل البيبلوغرافية
العنوان: Dissolution of calcite in the twilight zone: bacterial control of dissolution of sinking planktonic carbonates is unlikely.
المؤلفون: Bissett A; Max Planck Institute for Marine Microbiology, Bremen, Germany. Andrew.bissett@csiro.au, Neu TR, Beer Dd
المصدر: PloS one [PLoS One] 2011; Vol. 6 (11), pp. e26404. Date of Electronic Publication: 2011 Nov 15.
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: Public Library of Science Country of Publication: United States NLM ID: 101285081 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1932-6203 (Electronic) Linking ISSN: 19326203 NLM ISO Abbreviation: PLoS One Subsets: MEDLINE
أسماء مطبوعة: Original Publication: San Francisco, CA : Public Library of Science
مواضيع طبية MeSH: Bacterial Physiological Phenomena*, Calcium Carbonate/*metabolism , Geologic Sediments/*microbiology , Plankton/*metabolism, Biofilms/growth & development ; Microscopy, Confocal ; Microscopy, Electron, Scanning
مستخلص: We investigated the ability of bacterial communities to colonize and dissolve two biogenic carbonates (Foraminifera and oyster shells). Bacterial carbonate dissolution in the upper water column is postulated to be driven by metabolic activity of bacteria directly colonising carbonate surfaces and the subsequent development of acidic microenvironments. We employed a combination of microsensor measurements, scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM) and image analysis and molecular documentation of colonising bacteria to monitor microbial processes and document changes in shell surface topography. Bacterial communities rapidly colonised shell surfaces, forming dense biofilms with extracellular polymeric substance (EPS) deposits. Despite this, we found no evidence of bacterially mediated carbonate dissolution. Dissolution was not indicated by Ca²⁺ microprofiles, nor was changes in shell surface structure related to the presence of colonizing bacteria. Given the short time (days) settling carbonate material is actually in the twilight zone (500-1000 m), it is highly unlikely that microbial metabolic activity on directly colonised shells plays a significant role in dissolving settling carbonates in the shallow ocean.
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المشرفين على المادة: H0G9379FGK (Calcium Carbonate)
تواريخ الأحداث: Date Created: 20111122 Date Completed: 20120508 Latest Revision: 20211021
رمز التحديث: 20240628
مُعرف محوري في PubMed: PMC3216930
DOI: 10.1371/journal.pone.0026404
PMID: 22102861
قاعدة البيانات: MEDLINE
الوصف
تدمد:1932-6203
DOI:10.1371/journal.pone.0026404