Journal article
Importance of habitat diversity to changes in benthic metabolism over land-use gradients: evidence from three subtropical estuaries
Marine Ecology Progress Series, Vol.631, pp.31-47
21/11/2019
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Abstract
Seasonal rates of benthic gross primary production, net primary production and respiration were measured and whole-system carbon budgets constructed in 3 subtropical estuaries with different catchment land-use intensities to better understand how land-use changes influence benthic metabolism. Annual benthic net ecosystem metabolism (NEM) indicates that systems become more heterotrophic with increasing land-use intensity. This is due to a combination of an increase in the area of unvegetated habitats and the unvegetated habitats becoming more heterotrophic with increasing land-use intensity. Whole-system NEM is closely linked to benthic NEM, highlighting the important control of benthic metabolism on whole-system metabolism in shallow coastal systems. Carbon mass balances show whole-system net metabolism also shifted from net autotrophic to net heterotrophic, with a concomitant switch from CO2 uptake to emission, with increasing land-use intensity. Our findings demonstrate that land-use changes shift whole-estuary metabolism by altering both habitat distribution and within-habitat metabolism rates.
Details
- Title
- Importance of habitat diversity to changes in benthic metabolism over land-use gradients: evidence from three subtropical estuaries
- Creators
- J J Chen - Southern Cross UniversityN S Wells - Southern Cross UniversityD V Erler - Southern Cross UniversityB D Eyre - Southern Cross University
- Publication Details
- Marine Ecology Progress Series, Vol.631, pp.31-47
- Publisher
- Inter-Research
- Identifiers
- 991012926964702368
- Copyright
- Copyright © 2019 Inter-Research.
- Academic Unit
- Science; Centre for Coastal Biogeochemistry; Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article