Global Carbon Cycling on a Heterogeneous Seafloor
Journal
Trends in Ecology and Evolution
Journal Volume
33
Journal Issue
2
Pages
96-105
Date Issued
2018
Author(s)
Snelgrove, P.V.R.
Soetaert, K.
Solan, M.
Thrush, S.
Danovaro, R.
Fulweiler, R.W.
Kitazato, H.
Ingole, B.
Norkko, A.
Parkes, R.J.
Abstract
Diverse biological communities mediate the transformation, transport, and storage of elements fundamental to life on Earth, including carbon, nitrogen, and oxygen. However, global biogeochemical model outcomes can vary by orders of magnitude, compromising capacity to project realistic ecosystem responses to planetary changes, including ocean productivity and climate. Here, we compare global carbon turnover rates estimated using models grounded in biological versus geochemical theory and argue that the turnover estimates based on each perspective yield divergent outcomes. Importantly, empirical studies that include sedimentary biological activity vary less than those that ignore it. Improving the relevance of model projections and reducing uncertainty associated with the anticipated consequences of global change requires reconciliation of these perspectives, enabling better societal decisions on mitigation and adaptation.
Type
other