| Full text | |
| Author(s): |
Gorman, Daniel
[1, 2]
;
Pucci, Marinella
[1]
;
Soares, Lucy S. H.
[1]
;
Turra, Alexander
[1]
;
Schlacher, Thomas A.
[3]
Total Authors: 5
|
| Affiliation: | [1] Univ Sao Paulo, Inst Oceanog, Sao Paulo - Brazil
[2] Univ Sao Paulo, Ctr Marine Biol CEBIMar, Sao Sebastiao - Brazil
[3] Univ Sunshine Coast, Sch Sci & Engn, Sunshine Coast, Qld - Australia
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | ECOSYSTEMS; v. 22, n. 4, p. 796-804, JUN 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
Land-ocean coupling in the form of riverine inputs of terrestrial matter can constitute an energetic subsidy to food webs in nearshore coastal areas. In regions with distinctly seasonal rainfall patterns, the strength and spatial footprint of any terrestrial signal in receiving marine food webs is predicted to mirror seasonal changes in fluvial forcing. Here, we test this prediction in a subtropical bay by isotopically (C-13 and N-15) characterizing the main primary producers and reconstructing (using a Bayesian stable isotope mixing model) their contributions to the diet of thinstripe hermit crabs (Clibanarius vittatus). Seasonal rainfall flushed terrestrial carbon out of coastal watersheds, and this material made a sizable (up to 28%) contribution to the diet of marine consumers, in addition to mangroves, seagrass and algae. Our isotope model indicates that inputs of terrestrial grasses and other littoral vegetation were 15% greater as a result of increased fluvial forcing. In addition, the spatial footprint of the terrestrial signal in marine consumers propagated more widely throughout the bay during high-rainfall periods. Given the widespread conversion of natural watershed habitats for agriculture and urban development, understanding the nature, temporal dynamics and strength of such land-ocean coupling will become increasingly important. (AU) | |
| FAPESP's process: | 11/50317-5 - Biodiversity and functioning of a subtropical coastal ecosystem: a contribution to integrated management |
| Grantee: | Antonia Cecília Zacagnini Amaral |
| Support Opportunities: | BIOTA-FAPESP Program - Thematic Grants |
| FAPESP's process: | 12/09937-2 - Trophic interactions from the sublitoral food web of Araçá Bay, São Sebastião (SP): an assessment by the use of stable isotopes |
| Grantee: | Marinella Coutinho Jacinto Pucci |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 18/06162-6 - Evaluation of the current and future potential for marine protected areas (MPa) to safeguard the biodiversity, function and resilience of subtidal rocky seascapes in subtropical Brazil |
| Grantee: | Daniel Gorman |
| Support Opportunities: | Scholarships in Brazil - Young Researchers |