Caribbean-Wide, Long-Term Study of Seagrass Beds Reveals Local Variations, Shifts in Community Structure and Occasional Collapse

The CARICOMP monitoring network gathered standardized data from 52 seagrass sampling stations at 22 sites (mostly Thalassia testudinum-dominated beds in reef systems) across the Wider Caribbean twice a year over the period 1993 to 2007 (and in some cases up to 2012). Wide variations in community total biomass (285 to >2000 g dry m−2) and annual foliar productivity of the dominant seagrass T. testudinum (<200 and >2000 g dry m−2) were found among sites. Solar-cycle related intra-annual variations in T. testudinum leaf productivity were detected at latitudes > 16°N. Hurricanes had little to no long-term effects on these well-developed seagrass communities, except for 1 station, where the vegetation was lost by burial below ∼1 m sand. At two sites (5 stations), the seagrass beds collapsed due to excessive grazing by turtles or sea-urchins (the latter in combination with human impact and storms). The low-cost methods of this regional-scale monitoring program were sufficient to detect long-term shifts in the communities, and fifteen (43%) out of 35 long-term monitoring stations (at 17 sites) showed trends in seagrass communities consistent with expected changes under environmental deterioration.

[1]  Frederick T. Short,et al.  A Global Crisis for Seagrass Ecosystems , 2006 .

[2]  M. Mateo,et al.  Nutrient dynamics in seagrass ecosystems. , 2006 .

[3]  G. Warner,et al.  Biological indicators in the Caribbean coastal zone and their role in integrated coastal management , 2003 .

[4]  J. Fourqurean,et al.  Nutrient content of the seagrass Thalassia testudinum reveals regional patterns of relative availability of nitrogen and phosphorus in the Florida Keys USA , 2002 .

[5]  B. Gillanders.  Seagrasses, Fish, and Fisheries , 2007 .

[6]  Alberto Rodríguez-Ramírez,et al.  EVALUACIÓN RÁPIDA DE LOS EFECTOS DEL HURACÁN BETA EN LA ISLA PROVIDENCIA (CARIBE COLOMBIANO) , 2008 .

[7]  B. I. Tussenbroek,et al.  Selective elimination of rooted plants from a tropical seagrass bed in a back-reef lagoon: A hypothesis tested by Hurricane Wilma (2005) , 2008 .

[8]  James W. Fourqurean,et al.  Large-scale decline in offshore seagrass meadows in Bermuda , 2007 .

[9]  Frederick T. Short,et al.  Global seagrass distribution and diversity: A bioregional model , 2007 .

[10]  A. Rodriguez-Ramirez,et al.  Temporal patterns in coral reef, seagrass and mangrove communities from Chengue bay CARICOMP site (Colombia): 1993-2008. , 2010, Revista de biologia tropical.

[11]  A. Szmant,et al.  Water column and sediment nitrogen and phosphorus distribution patterns in the Florida Keys, USA , 1996, Coral Reefs.

[12]  W. Dennison,et al.  Influence of submarine springs and wastewater on nutrient dynamics of Caribbean seagrass meadows , 2005 .

[13]  B. I. Tussenbroek,et al.  Spatial and temporal variability in biomass and production of psammophytic Halimeda incrassata (Bryopsidales, Chlorophyta) in a Caribbean reef lagoon , 2007 .

[14]  J. B. Rosario,et al.  The Effect of Fresh Water Runoff on the Distribution of Dissolved Inorganic Nutrients and Plankton in the Bocas del Toro Archipelago, Caribbean Panama , 2005 .

[15]  F. Sklar,et al.  Importance of Storm Events in Controlling Ecosystem Structure and Function in a Florida Gulf Coast Estuary , 2004 .

[16]  C. Duarte.  Seagrass depth limits , 1991 .

[17]  David J. Smith,et al.  High connectivity of Indo-Pacific seagrass fish assemblages with mangrove and coral reef habitats , 2008 .

[18]  F. Short.  Effects of sediment nutrients on seagrasses: literature review and mesocosm experiment , 1987 .

[19]  Correction: Caribbean-Wide, Long-Term Study of Seagrass Beds Reveals Local Variations, Shifts in Community Structure and Occasional Collapse , 2014, PLoS ONE.

[20]  James W. Fourqurean,et al.  Spatial and temporal pattern in seagrass community composition and productivity in south Florida , 2001 .

[21]  I. Nagelkerken,et al.  Structure, food and shade attract juvenile coral reef fish to mangrove and seagrass habitats: a field experiment , 2006 .

[22]  Jack J. Middelburg,et al.  Major role of marine vegetation on the oceanic carbon cycle , 2004 .

[23]  B. I. Tussenbroek,et al.  Simulation of hurricane-like disturbances on a Caribbean seagrass bed , 2005 .

[24]  B. I. Tussenbroek.  Dynamics of seagrasses and associated algae in coral reef lagoons , 2011 .

[25]  Carlos M. Duarte,et al.  A blueprint for blue carbon: toward an improved understanding of the role of vegetated coastal habitats in sequestering CO2 , 2011 .

[26]  B. V. Van Tussenbroek,et al.  Environmental state and tendencies of the Puerto Morelos CARICOMP site, Mexico. , 2010, Revista de biologia tropical.

[27]  Robert J. Orth,et al.  Assessing Water Quality with Submersed Aquatic Vegetation , 1993 .

[28]  James W. Fourqurean,et al.  Phosphorus limitation of primary production in Florida Bay: Evidence from C:N:P ratios of the dominant seagrass Thalassia testudinum , 1992 .

[29]  B. Kjerfve.  CARICOMP : Caribbean coral reef, seagrass and mangrove sites , 1998 .

[30]  P. Chambers,et al.  The interaction between water movement, sediment dynamics and submersed macrophytes , 2001, Hydrobiologia.

[31]  W. Dennison,et al.  Extinction risk assessment of the world’s seagrass species , 2011 .

[32]  K. Heck,et al.  Hurricane effects on seagrasses along Alabama's Gulf Coast , 2006 .

[33]  J. Cortés,et al.  Monitoring coral reefs, seagrasses and mangroves in Costa Rica (CARICOMP). , 2010, Revista de biologia tropical.

[34]  James W. Fourqurean,et al.  Seagrass ecosystems as a globally significant carbon stock , 2012 .

[35]  James Udy,et al.  Growth and physiological responses of three seagrass species to elevated sediment nutrients in Moreton Bay, Australia , 1997 .

[36]  G. Wefer.  Carbonate production by algae Halimeda, Penicillus and Padina , 1980, Nature.

[37]  Xufeng Niu,et al.  Factors controlling seagrass growth in a gulf coastal system: Water and sediment quality and light , 1998 .

[38]  C. Duarte.  Seagrass nutrient content , 1990 .

[39]  M. Durako,et al.  Forecasting responses of seagrass distributions to changing water quality using monitoring data , 2003 .

[40]  A. Armitage,et al.  Long-Term Effects of Adding Nutrients to an Oligotrophic Coastal Environment , 2011, Ecosystems.

[41]  I. Nagelkerken,et al.  Dependence of Caribbean reef fishes on mangroves and seagrass beds as nursery habitats: a comparison of fish faunas between bays with and without mangroves/seagrass beds , 2001 .

[42]  G. Kendrick,et al.  Trophic Transfers from Seagrass Meadows Subsidize Diverse Marine and Terrestrial Consumers , 2008, Ecosystems.

[43]  G. D. Pulido.  Variation in ecological parameters of Thalassia testudinum across the CARICOMP Network , 1997 .

[44]  R. Coles,et al.  SEAGRASS-WATCH: COMMUNITY BASED MONITORING OF SEAGRASS RESOURCES. , 2000 .

[45]  J. Fourqurean,et al.  Effects of excluding sea turtle herbivores from a seagrass bed: Overgrazing may have led to loss of seagrass meadows in Bermuda , 2010 .

[46]  F. Short,et al.  SeagrassNet monitoring across the Americas: case studies of seagrass decline , 2006 .

[47]  N. Marbà,et al.  Scaling of ramet size and spacing in seagrasses: implications for stand development , 2003 .

[48]  C. Fonseca,et al.  Monitoreo de pastos marinos en Perezoso, Cahuita, Costa Rica (sitio CARICOMP) , 2005 .

[49]  P. Mumby,et al.  Physical environments of the Caribbean Sea , 2012 .