Abstract:
:Tidal marshes have a large capacity for producing and storing organic matter, making their role in the global carbon budget disproportionate to land area. Most of the organic matter stored in these systems is in soils where it contributes 2-5 times more to surface accretion than an equal mass of minerals. Soil organic matter (SOM) sequestration is the primary process by which tidal marshes become perched high in the tidal frame, decreasing their vulnerability to accelerated relative sea level rise (RSLR). Plant growth responses to RSLR are well understood and represented in century-scale forecast models of soil surface elevation change. We understand far less about the response of SOM decomposition to accelerated RSLR. Here we quantified the effects of flooding depth and duration on SOM decomposition by exposing planted and unplanted field-based mesocosms to experimentally manipulated relative sea level over two consecutive growing seasons. SOM decomposition was quantified as CO2 efflux, with plant- and SOM-derived CO2 separated via δ(13) CO2 . Despite the dominant paradigm that decomposition rates are inversely related to flooding, SOM decomposition in the absence of plants was not sensitive to flooding depth and duration. The presence of plants had a dramatic effect on SOM decomposition, increasing SOM-derived CO2 flux by up to 267% and 125% (in 2012 and 2013, respectively) compared to unplanted controls in the two growing seasons. Furthermore, plant stimulation of SOM decomposition was strongly and positively related to plant biomass and in particular aboveground biomass. We conclude that SOM decomposition rates are not directly driven by relative sea level and its effect on oxygen diffusion through soil, but indirectly by plant responses to relative sea level. If this result applies more generally to tidal wetlands, it has important implications for models of SOM accumulation and surface elevation change in response to accelerated RSLR.
journal_name
Glob Chang Bioljournal_title
Global change biologyauthors
Mueller P,Jensen K,Megonigal JPdoi
10.1111/gcb.13082subject
Has Abstractpub_date
2016-01-01 00:00:00pages
404-14issue
1eissn
1354-1013issn
1365-2486journal_volume
22pub_type
杂志文章abstract::Forested catchments provide critically important water resources. Due to dramatic global forest change over the past decades, the importance of including forest or vegetation change in the assessment of water resources under climate change has been highly recognized by Intergovernmental Panel on Climate Change (IPCC);...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13983
更新日期:2018-02-01 00:00:00
abstract::Fungal decomposition of soil organic matter depends on soil nitrogen (N) availability. This ecosystem process is being jeopardized by changes in N inputs that have resulted from a tripling of atmospheric N deposition in the last century. Soil fungi are impacted by atmospheric N deposition due to higher N availability,...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.15444
更新日期:2020-11-07 00:00:00
abstract::Lakes at high altitude and latitude are typically unproductive ecosystems where external factors outweigh the relative importance of in-lake processes, making them ideal sentinels of climate change. Climate change is inducing upward vegetation shifts at high altitude and latitude regions that translate into changes in...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13545
更新日期:2017-06-01 00:00:00
abstract::Climate warming will affect terrestrial ecosystems in many ways, and warming-induced changes in terrestrial carbon (C) cycling could accelerate or slow future warming. So far, warming experiments have shown a wide range of C flux responses, across and within biome types. However, past meta-analyses of C flux responses...
journal_title:Global change biology
pub_type: 杂志文章,meta分析
doi:10.1111/gcb.14603
更新日期:2019-05-01 00:00:00
abstract::Microbial-derived nitrogen (N) is now recognized as an important source of soil organic N. However, the mechanisms that govern the production of microbial necromass N, its turnover, and stabilization in soil remain poorly understood. To assess the effects of elevated temperature on bacterial and fungal necromass N pro...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.15206
更新日期:2020-09-01 00:00:00
abstract::Autumn phenology plays a critical role in regulating climate-biosphere interactions. However, the climatic drivers of autumn phenology remain unclear. In this study, we applied four methods to estimate the date of the end of the growing season (EOS) across China's temperate biomes based on a 30-year normalized differe...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13081
更新日期:2016-02-01 00:00:00
abstract::Extreme droughts, heat waves, frosts, precipitation, wind storms and other climate extremes may impact the structure, composition and functioning of terrestrial ecosystems, and thus carbon cycling and its feedbacks to the climate system. Yet, the interconnected avenues through which climate extremes drive ecological a...
journal_title:Global change biology
pub_type: 杂志文章,评审
doi:10.1111/gcb.12916
更新日期:2015-08-01 00:00:00
abstract::Most North American forests are at some stage of post-disturbance regrowth, subject to a changing climate, and exhibit growth and mortality patterns that may not be closely coupled to annual environmental conditions. Distinguishing the possibly interacting effects of these processes is necessary to put short-term stud...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12404
更新日期:2014-01-01 00:00:00
abstract::The urban heat island effect, where urban areas exhibit higher temperatures than less-developed suburban and natural habitats, occurs in cities across the globe and is well understood from a physical perspective and at broad spatial scales. However, very little is known about how thermal variation caused by urbanizati...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14509
更新日期:2019-02-01 00:00:00
abstract::Tropical forest responses to climate and atmospheric change are critical to the future of the global carbon budget. Recent studies have reported increases in estimated above-ground biomass (EAGB) stocks, productivity, and mortality in old-growth tropical forests. These increases could reflect a shift in forest functio...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14833
更新日期:2020-03-01 00:00:00
abstract::It is critical to accurately estimate carbon (C) turnover time as it dominates the uncertainty in ecosystem C sinks and their response to future climate change. In the absence of direct observations of ecosystem C losses, C turnover times are commonly estimated under the steady state assumption (SSA), which has been a...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14547
更新日期:2019-03-01 00:00:00
abstract::Changes in peak photosynthesis timing (PPT) could substantially change the seasonality of the terrestrial carbon cycle. Spring PPT in dry regions has been documented for some individual plant species on a stand scale, but both the spatio-temporal pattern of shifting PPT on a continental scale and its determinants rema...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13224
更新日期:2016-08-01 00:00:00
abstract::The purpose of this study was to evaluate 10 process-based terrestrial biosphere models that were used for the IPCC fifth Assessment Report. The simulated gross primary productivity (GPP) is compared with flux-tower-based estimates by Jung et al. [Journal of Geophysical Research 116 (2011) G00J07] (JU11). The net prim...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12187
更新日期:2013-07-01 00:00:00
abstract::Feeding 9-10 billion people by 2050 and preventing dangerous climate change are two of the greatest challenges facing humanity. Both challenges must be met while reducing the impact of land management on ecosystem services that deliver vital goods and services, and support human health and well-being. Few studies to d...
journal_title:Global change biology
pub_type: 杂志文章,评审
doi:10.1111/gcb.12160
更新日期:2013-08-01 00:00:00
abstract::Invasive alien plant species threaten native biodiversity, disrupt ecosystem functions and can cause large economic damage. Plant invasions have been predicted to further increase under ongoing global environmental change. Numerous case studies have compared the performance of invasive and native plant species in resp...
journal_title:Global change biology
pub_type: 杂志文章,meta分析
doi:10.1111/gcb.13579
更新日期:2017-08-01 00:00:00
abstract::The ecological impacts of meeting rising demands for food production can potentially be mitigated by two competing land-use strategies: off-setting natural habitats through intensification of existing farmland (land sparing), or elevating biodiversity within the agricultural matrix via the integration of "wildlife-fri...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14601
更新日期:2019-05-01 00:00:00
abstract::Wheat grain protein concentration is an important determinant of wheat quality for human nutrition that is often overlooked in efforts to improve crop production. We tested and applied a 32-multi-model ensemble to simulate global wheat yield and quality in a changing climate. Potential benefits of elevated atmospheric...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14481
更新日期:2019-01-01 00:00:00
abstract::Drought, widely studied as an important driver of ecosystem dynamics, is predicted to increase in frequency and severity globally. To study drought, ecologists must define or at least operationalize what constitutes a drought. How this is accomplished in practice is unclear, particularly given that climatologists have...
journal_title:Global change biology
pub_type: 杂志文章,评审
doi:10.1111/gcb.14747
更新日期:2019-10-01 00:00:00
abstract::How ocean acidification affects marine life is a major concern for science and society. However, its impacts on encrusting biofouling communities, that are both the initial colonizers of hard substrata and of great economic importance, are almost unknown. We showed that community composition changed significantly, fro...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12841
更新日期:2015-05-01 00:00:00
abstract::Global increase in drought occurrences threatens the stability of terrestrial ecosystem functioning. Evergreen broadleaf forests (EBFs) keep leaves throughout the year, and therefore could experience higher drought risks than other biomes. However, the recent temporal variability of global vegetation productivity or l...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14748
更新日期:2019-10-01 00:00:00
abstract::Although much effort has been devoted to quantifying how warming alters carbon cycling across diverse ecosystems, less is known about how these changes are linked to the cycling of bioavailable nitrogen and phosphorus. In freshwater ecosystems, benthic biofilms (i.e. thin films of algae, bacteria, fungi, and detrital ...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13205
更新日期:2016-06-01 00:00:00
abstract::Accurate assessments of forest response to current and future climate and human actions are needed at regional scales. Predicting future impacts on forests will require improved analysis of species-level adaptation, resilience, and vulnerability to mortality. Land system models can be enhanced by creating trait-based ...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12651
更新日期:2014-12-01 00:00:00
abstract::The impact of climate change on dispersal processes is largely ignored in risk assessments for crop diseases, as inoculum is generally assumed to be ubiquitous and nonlimiting. We suggest that consideration of the impact of climate change on the connectivity of crops for inoculum transmission may provide additional ex...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13368
更新日期:2016-11-01 00:00:00
abstract::Efforts to limit global warming to below 2°C in relation to the pre-industrial level are under way, in accordance with the 2015 Paris Agreement. However, most impact research on agriculture to date has focused on impacts of warming >2°C on mean crop yields, and many previous studies did not focus sufficiently on extre...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14542
更新日期:2018-12-07 00:00:00
abstract::Simultaneously with warming climate, other climatic and environmental factors are also changing. Here, we investigated for the first time the effects of elevated temperature, increased ultraviolet-B (UVB) radiation, fertilization and all combinations of these on the growth, secondary chemistry and needle structure of ...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.12464
更新日期:2014-07-01 00:00:00
abstract::The importance of herbivore-plant and soil biota-plant interactions in terrestrial ecosystems is amply recognized, but the effects of aboveground herbivores on soil biota remain challenging to predict. To find global patterns in belowground responses to vertebrate herbivores, we performed a meta-analysis of studies th...
journal_title:Global change biology
pub_type: 杂志文章,meta分析
doi:10.1111/gcb.13675
更新日期:2017-09-01 00:00:00
abstract::Phosphorus (P) is an essential macro-nutrient required for plant metabolism and growth. Low P availability could potentially limit plant responses to elevated carbon dioxide (eCO2 ), but consensus has yet to be reached on the extent of this limitation. Here, based on data from experiments that manipulated both CO2 and...
journal_title:Global change biology
pub_type: 杂志文章,meta分析
doi:10.1111/gcb.15277
更新日期:2020-10-01 00:00:00
abstract::The net ecosystem CO2 exchange (NEE) drives the carbon (C) sink-source strength of northern peatlands. Since NEE represents a balance between various production and respiration fluxes, accurate predictions of its response to global changes require an in depth understanding of these underlying processes. Currently, how...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.14292
更新日期:2018-08-01 00:00:00
abstract::Inland waters are increasingly recognized as critical sites of methane emissions to the atmosphere, but the biogeochemical reactions driving such fluxes are less well understood. The Prairie Pothole Region (PPR) of North America is one of the largest wetland complexes in the world, containing millions of small, shallo...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13633
更新日期:2017-08-01 00:00:00
abstract::The acclimation capacity of leading edge tree populations is crucially important in a warming climate. Theoretical considerations suggest that adaptation through genetic change is needed, but this may be a slow process. Both positive and catastrophic outcomes have been predicted, while empirical studies have lagged be...
journal_title:Global change biology
pub_type: 杂志文章
doi:10.1111/gcb.13956
更新日期:2018-02-01 00:00:00