John Ogden | University of South Florida (original) (raw)
Papers by John Ogden
Science, 1997
ABSTRACT The Florida Keys are a heavily managed land-sea reserve, preserved as a National Marine ... more ABSTRACT The Florida Keys are a heavily managed land-sea reserve, preserved as a National Marine Sanctuary, but fishing and collecting are prohibited in only a small area. Ogden discusses the management of this Sanctuary and how new results on the sources of larvae for marine species in the Caribbean, presented by Roberts et al., will influence future planning.
Coral recruitment and juvenile coral mortality rates The project continued with a successful fiel... more Coral recruitment and juvenile coral mortality rates The project continued with a successful field expedition in July 2008. The study was conducted at two depths, 7 m and 18 m, in Fully Protected Zones (FPZs) (Eastern Sambo Research Only; Western Sambo Ecological Reserve; South Carysfort and Molasses Reef) and reference sites (Middle Sambo, Pelican Shoal, Maitland and Pickles) in the Upper and Lower Keys. Thirty two permanent quadrats (95 x 65 cm) have been established at each depth. We were successful in relocating the study sites in July 2008. We did not attempt to work at the Molasses and Pickles reef sites, previously sampled in 2005, due to the limited funding available for the project. The Smith team re-surveyed 93 % (358/384) of the permanent quadrats at Western
Marine Ecology Progress Series, 1984
Estuaries and Coasts, 2021
Susan Lynn Williams (1951–2018) was an exceptional marine ecologist whose research focused broadl... more Susan Lynn Williams (1951–2018) was an exceptional marine ecologist whose research focused broadly on the ecology of benthic nearshore environments dominated by seagrasses, seaweeds, and coral reefs. She took an empirical approach founded in techniques of physiological ecology. Susan was committed to applying her research results to ocean management through outreach to decision-makers and resource managers. Susan’s career included research throughout the USA in tropical, temperate, and polar regions, but she specialized in tropical marine ecology. Susan’s scholarship, leadership, and friendship touched many people, leading to this multi-authored paper. Susan’s scholarship was multi-faceted, and she excelled in scientific discovery, integration of scientific results, application of science for conservation, and teaching, especially as a mentor to undergraduate and graduate students and postdoctoral scholars. Susan served in a variety of leadership positions throughout her career. She...
Revista de biologia tropical, 2010
The rapid decline of coastal ecosystems of the Wider Caribbean is entering its fifth decade. Some... more The rapid decline of coastal ecosystems of the Wider Caribbean is entering its fifth decade. Some of the best science documenting this decline and its causes has been done by the laboratories of the Association of Marine Laboratories of the Caribbean (AMLC). Alarmed at the trends, Caribbean conservation pioneers established marine protected areas (MPAs) which spread throughout the region. Unfortunately, many have little or no protection and are now known to be too small to be effective in sustaining coastal ecosystems. Marine spatial planning (MSP) holds much promise to encompass the large geographic scales of the ecological processes and human impacts that influence coastal ecosystems and adjacent lands. The AMLC, through the scientific expertise and the national political connections of its member institutions, is well-positioned to help implement a pilot project. MSP a first step in ecosystem-based management and has had considerable success elsewhere. It holds our best chance of...
Oceanography, Mar 1, 2016
Ecology, 1973
Page 1. MOVEMENTS, FORAGING GROUPS, AND DIURNAL MIGRATIONS OF THE STRIPED PARROTFISH SCARUS CROlC... more Page 1. MOVEMENTS, FORAGING GROUPS, AND DIURNAL MIGRATIONS OF THE STRIPED PARROTFISH SCARUS CROlCENSIS BLOCH (SCARIDAE) 1 JOHN C. OGDEN AND NANCY S. BUCKMAN2 Smithsonian Tropical Research Institute, Balboa, Canal Zone Abstract. ...
Coral Reefs, 2014
ABSTRACT With coral populations in decline globally, it is critical that we tease apart the relat... more ABSTRACT With coral populations in decline globally, it is critical that we tease apart the relative impacts of ecological and physical perturbations on reef ecosystems to determine the most appropriate management actions. This study compared the trajectories of benthic assemblages from 1998 to 2011 in three no-take reserves and three sites open to fishing, at 7–9 and 15–18 m depth in the Florida Keys. We evaluated temporal changes in the benthic assemblage to infer whether fisheries bans in no-take reserves could have cascading effects on the benthos in this region. Coral cover declined significantly over time at our sites and that trend was driven almost exclusively by decline of the Orbicella (formerly Montastraea) annularis species complex. Other coral taxa showed remarkable stasis and resistance to a variety of environmental perturbations. Protection status did not influence coral or macroalgal cover. The dynamics of corals and macroalgae in the 15 years since the reserves were established in 1997 suggest that although the reserves protected fish, they were of no perceptible benefit to Florida’s corals.
Bulletin of Marine …, 2001
During 1979 and 1!l80 the settlement of postlarval grunts (mostly French grunts. H"..mu{(»Ij... more During 1979 and 1!l80 the settlement of postlarval grunts (mostly French grunts. H"..mu{(»Ijlm'Qhnen.lwm) from the plankton tl, inshore areas in Tague Bay. St. Croix, Virgin Islands, was monitored. Settlement occurred at all times of the year. but showed two distinct maxima during May-June and October-November. Summer settlement rates wel'e approximately one-thir-.i the peak rates, whereas winter settlement rates were low hut always present. A r1ominant, semilunar periorlicity in the settlement of t.he postlarvae was dearly present. but smaller interspersed weekly peaks occurred. Calculation of the fertilization dates of recently settled postlarval b'l"llnts, derived frum otolith ages, also established a dominant 15·day periodicity, hut ab'llin interspersed with smaller weekly fertilization peaks. The phase of settlement and fertilization is most strongly associated with the quarter moons and/or intermediate daily excursions of the tides: the smaller weekly...
Science, 1997
ABSTRACT The Florida Keys are a heavily managed land-sea reserve, preserved as a National Marine ... more ABSTRACT The Florida Keys are a heavily managed land-sea reserve, preserved as a National Marine Sanctuary, but fishing and collecting are prohibited in only a small area. Ogden discusses the management of this Sanctuary and how new results on the sources of larvae for marine species in the Caribbean, presented by Roberts et al., will influence future planning.
Coral recruitment and juvenile coral mortality rates The project continued with a successful fiel... more Coral recruitment and juvenile coral mortality rates The project continued with a successful field expedition in July 2008. The study was conducted at two depths, 7 m and 18 m, in Fully Protected Zones (FPZs) (Eastern Sambo Research Only; Western Sambo Ecological Reserve; South Carysfort and Molasses Reef) and reference sites (Middle Sambo, Pelican Shoal, Maitland and Pickles) in the Upper and Lower Keys. Thirty two permanent quadrats (95 x 65 cm) have been established at each depth. We were successful in relocating the study sites in July 2008. We did not attempt to work at the Molasses and Pickles reef sites, previously sampled in 2005, due to the limited funding available for the project. The Smith team re-surveyed 93 % (358/384) of the permanent quadrats at Western
Marine Ecology Progress Series, 1984
Estuaries and Coasts, 2021
Susan Lynn Williams (1951–2018) was an exceptional marine ecologist whose research focused broadl... more Susan Lynn Williams (1951–2018) was an exceptional marine ecologist whose research focused broadly on the ecology of benthic nearshore environments dominated by seagrasses, seaweeds, and coral reefs. She took an empirical approach founded in techniques of physiological ecology. Susan was committed to applying her research results to ocean management through outreach to decision-makers and resource managers. Susan’s career included research throughout the USA in tropical, temperate, and polar regions, but she specialized in tropical marine ecology. Susan’s scholarship, leadership, and friendship touched many people, leading to this multi-authored paper. Susan’s scholarship was multi-faceted, and she excelled in scientific discovery, integration of scientific results, application of science for conservation, and teaching, especially as a mentor to undergraduate and graduate students and postdoctoral scholars. Susan served in a variety of leadership positions throughout her career. She...
Revista de biologia tropical, 2010
The rapid decline of coastal ecosystems of the Wider Caribbean is entering its fifth decade. Some... more The rapid decline of coastal ecosystems of the Wider Caribbean is entering its fifth decade. Some of the best science documenting this decline and its causes has been done by the laboratories of the Association of Marine Laboratories of the Caribbean (AMLC). Alarmed at the trends, Caribbean conservation pioneers established marine protected areas (MPAs) which spread throughout the region. Unfortunately, many have little or no protection and are now known to be too small to be effective in sustaining coastal ecosystems. Marine spatial planning (MSP) holds much promise to encompass the large geographic scales of the ecological processes and human impacts that influence coastal ecosystems and adjacent lands. The AMLC, through the scientific expertise and the national political connections of its member institutions, is well-positioned to help implement a pilot project. MSP a first step in ecosystem-based management and has had considerable success elsewhere. It holds our best chance of...
Oceanography, Mar 1, 2016
Ecology, 1973
Page 1. MOVEMENTS, FORAGING GROUPS, AND DIURNAL MIGRATIONS OF THE STRIPED PARROTFISH SCARUS CROlC... more Page 1. MOVEMENTS, FORAGING GROUPS, AND DIURNAL MIGRATIONS OF THE STRIPED PARROTFISH SCARUS CROlCENSIS BLOCH (SCARIDAE) 1 JOHN C. OGDEN AND NANCY S. BUCKMAN2 Smithsonian Tropical Research Institute, Balboa, Canal Zone Abstract. ...
Coral Reefs, 2014
ABSTRACT With coral populations in decline globally, it is critical that we tease apart the relat... more ABSTRACT With coral populations in decline globally, it is critical that we tease apart the relative impacts of ecological and physical perturbations on reef ecosystems to determine the most appropriate management actions. This study compared the trajectories of benthic assemblages from 1998 to 2011 in three no-take reserves and three sites open to fishing, at 7–9 and 15–18 m depth in the Florida Keys. We evaluated temporal changes in the benthic assemblage to infer whether fisheries bans in no-take reserves could have cascading effects on the benthos in this region. Coral cover declined significantly over time at our sites and that trend was driven almost exclusively by decline of the Orbicella (formerly Montastraea) annularis species complex. Other coral taxa showed remarkable stasis and resistance to a variety of environmental perturbations. Protection status did not influence coral or macroalgal cover. The dynamics of corals and macroalgae in the 15 years since the reserves were established in 1997 suggest that although the reserves protected fish, they were of no perceptible benefit to Florida’s corals.
Bulletin of Marine …, 2001
During 1979 and 1!l80 the settlement of postlarval grunts (mostly French grunts. H"..mu{(»Ij... more During 1979 and 1!l80 the settlement of postlarval grunts (mostly French grunts. H"..mu{(»Ijlm'Qhnen.lwm) from the plankton tl, inshore areas in Tague Bay. St. Croix, Virgin Islands, was monitored. Settlement occurred at all times of the year. but showed two distinct maxima during May-June and October-November. Summer settlement rates wel'e approximately one-thir-.i the peak rates, whereas winter settlement rates were low hut always present. A r1ominant, semilunar periorlicity in the settlement of t.he postlarvae was dearly present. but smaller interspersed weekly peaks occurred. Calculation of the fertilization dates of recently settled postlarval b'l"llnts, derived frum otolith ages, also established a dominant 15·day periodicity, hut ab'llin interspersed with smaller weekly fertilization peaks. The phase of settlement and fertilization is most strongly associated with the quarter moons and/or intermediate daily excursions of the tides: the smaller weekly...