Controls on ecosystems carbon dioxide exchange in short- and long-hydroperiod Florida Everglades freshwater marshes
Permanent Link:

Material Information

Title:
Controls on ecosystems carbon dioxide exchange in short- and long-hydroperiod Florida Everglades freshwater marshes
Creator:
Schedlbauer, Jessica L.
Munyon, Jay W.
Oberbauer, Steven F.
Gaiser, Evelyn E.
Starr, Gregory
Publisher:
Florida Coastal Everglades Long Term Ecological Research
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Freshwater ecology -- Florida -- Everglades
Marshes -- Florida -- Everglades
Carbon dioxide -- Florida -- Everglades
Genre:
article
serial ( sobekcm )
Spatial Coverage:
Everglades (Fla.)

Notes

Abstract:
Although freshwater wetlands are among the most productive ecosystems on Earth, little is known of carbon dioxide (CO2) exchange in low latitude wetlands. The Everglades is an extensive, oligotrophic wetland in south Florida characterized by short- and long-hydroperiod marshes. Chamber-based CO2 exchange measurements were made to compare the marshes and examine the roles of primary producers, seasonality, and environmental drivers in determining exchange rates. Low rates of CO2 exchange were observed in both marshes with net ecosystem production reaching maxima of 3.77 and 4.28 μmol CO2 m−2 s−1 in short- and long-hydroperiod marshes, respectively. Fluxes of CO2 were affected by seasonality only in the short-hydroperiod marsh, where flux rates were significantly lower in the wet season than in the dry season. Emergent macrophytes dominated fluxes at both sites, though this was not the case for the short-hydroperiod marsh in the wet season. Water depth, a factor partly under human control, significantly affected gross ecosystem production at the short-hydroperiod marsh. As Everglades ecosystem restoration proceeds, leading to deeper water and longer hydroperiods, productivity in short-hydroperiod marshes will likely be more negatively affected than in long-hydroperiod marshes. The Everglades stand in contrast to many freshwater wetlands because of ecosystem-wide low productivity rates.

Record Information

Source Institution:
Florida International University
Rights Management:
Please contact the owning institution for licensing and permissions. It is the users responsibility to ensure use does not violate any third party rights.
Resource Identifier:
FI14082521