کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5764864 1626406 2017 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The distribution of pelagic sound scattering layers across the southwest Indian Ocean
ترجمه فارسی عنوان
توزیع لایه های پراکندگی صدا در سراسر جنوب غربی اقیانوس هند
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی

Shallow and deep scattering layers (SLs) were surveyed with split-beam echosounders across the southwest Indian Ocean (SWIO) to investigate their vertical and geographical distribution. Cluster analysis was employed to objectively classify vertical backscatter profiles. Correlations between backscatter and environmental covariates were modelled using generalized additive mixed models (GAMMs) with spatial error structures. Structurally distinct SL regimes were found across the Subantarctic Front. GAMMs indicated a close relationship between sea surface temperature and mean volume backscatter, with significantly elevated backscatter in the subtropical convergence zone. The heterogeneous distribution of scattering layer biota reflects the biogeographic zonation of the survey area and is likely to have implications for predator foraging and carbon cycling in the Indian Ocean.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 136, February 2017, Pages 108-121
نویسندگان
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