Authors / CoAuthors
Radke, L.C. | Huang, Z. | Przeslawski, R. | McArthur, M. | Webster, I.
Abstract
Mapping of benthic habitats seldom considers biogeochemical variables or changes across time. We aimed to: (i) develop winter and summer benthic habitat maps for a sandy embayment; and (ii) compare the effectiveness of various maps for differentiating infauna. Patch-types (internally homogeneous areas of seafloor) were constructed using combinations of abiotic parameters, and are presented in sediment-based, biogeochemistry-based and combined sediment/biogeochemistry-based habitat maps. August and February surveys were undertaken in Jervis Bay, Australia, to collect samples for physical (%mud, sorting, %carbonate), biogeochemical (chlorophyll a, sulfur, sediment metabolism, bio-available elements) and infaunal analyses. Boosted Decision Tree and cokriging models generated spatially continuous data-layers. Habitat maps were made from classified layers using GIS overlays, and were interpreted from a biophysical-process perspective. Biogeochemistry and %mud varied spatially and temporally, even in visually homogeneous sediments. Species turnover across patch-types was important for diversity, and the utility of habitat maps for differentiating biological communities varied across months. Diversity patterns were broadly related to reactive carbon and redox which varied temporally. Inclusion of biogeochemical factors and time in habitat maps provides a better framework for differentiating species and interpreting biodiversity patterns than once-off studies based solely on sedimentology or video-analysis.
Product Type
nonGeographicDataset
eCat Id
71129
Contact for the resource
Owner
Custodian
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Point of contact
- Contact instructions
- PSCD
Digital Object Identifier
Keywords
-
- External Publication
- ( Theme )
-
- abiotic surrogates
- ( Theme )
-
- environmental
- ( Theme )
-
- geochemistry
- ( Theme )
-
- seabed
- ( Theme )
-
- marine survey
- ( Theme )
-
- marine
- ( Theme )
-
- CERF
-
- AU-NSW
- Australian and New Zealand Standard Research Classification (ANZSRC)
-
- Earth Sciences
-
- Published_External
Publication Date
2011-01-01T00:00:00
Creation Date
Security Constraints
Legal Constraints
Non-Exclusive licence to publish copyright (please provide TRIM link)
Access - license
Use - license
Status
Purpose
Maintenance Information
unknown
Topic Category
geoscientificInformation
Series Information
Lineage
Unknown
Parent Information
Extents
[-35.13125, -35.00526, 150.67725, 150.78627]
Reference System
Spatial Resolution
Service Information
Associations
Source Information
Source data not available.