Caribbean streams are dominated by a shrimp and fish assemblage for which amphidromy (eggs or larvae carried to the ocean followed migration of juveniles upriver) is suspected. Effects dams on this likely demonstrate complex interactions as function reproductive strategy type dam structure. Our goals were determine (1) whether high reduce eliminate stream corridor permeability with respect migration, (2) extent spillway discharge, (3) relative roles native fauna disturbance suppression (in...

Large dams degrade the integrity of a wide variety ecosystems, yet direct downstream effects have received most attention from ecosystem managers and researchers. We investigated indirect upstream resulting decimation migratory freshwater shrimp fish populations in Puerto Rico, USA, both high- low-gradient streams. In high-gradient streams above large dams, native shrimps fishes were extremely rare, whereas similar sites without had high abundances consumers. Losses fauna dramatically...

Epibenthic fish comn~unities residing in seagrass beds on shallow (<0.5 m) mudbanks Florida Bay.USA, were quantitatively sampled with a throw trap method.The overall average density of 11 m-2 was substantially higher than most previously reported densities for habitats.Four sites, representing 4 different subenvironments Bay, differed widely species composition and individual species; results discriminant function analysis indicated that communities at the sites relatively distinct.Species...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 201:199-209 (2000) - doi:10.3354/meps201199 Trampling in a seagrass assemblage: direct effects, response of associated fauna, and role substrate characteristics Caren E. Eckrich*, Jeff G. Holmquist** Department Science, University Puerto Rico at Mayagüez, PO Box 908, Lajas, 00667, USA *Present address: Sea...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 158:121-130 (1997) - doi:10.3354/meps158121 Disturbance and gap formation in a marine benthic mosaic: influence of shifting macroalgal patches on seagrass structure mobile invertebrates Jeff G. Holmquist* Department Biological Science, Florida State University, Tallahassee, 32306-2043, USA *Present address:...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 250:61-70 (2003) - doi:10.3354/meps250061 Effects of propeller scarring on macrofaunal use seagrass Thalassia testudinum Amy V. Uhrin1,2,*, Jeff G. Holmquist1,3,4 1Department Science, University Puerto Rico, Mayagüez Campus, PO Box 908, Lajas, Rico 00667, USA 2NOAA, National Ocean Service, Center for Coastal...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 167:297-299 (1998) - doi:10.3354/meps167297 δ15N evidence for nitrogen fixation associated with macroalgae from a seagrass-mangrove-coral reef system R. France1,*, J. Holmquist2, M. Chandler3, A. Cattaneo4 1Harvard University, Graduate School of Design, 48 Quincy St, Cambridge, Massachusetts 02138, USA 2 Dept...

1. Compared with most other tropical regions, Puerto Rico appears to have dammed its running waters decades earlier and a greater degree. The island has more large dams per unit area than many countries in both temperate regions (e.g. three times that of the USA), peak rate dam construction occurred two or before reported rates Latin America, Asia Africa. 2. is potential window into future freshwater migratory fauna given island's extent magnitude development available scientific information...

This study empirically examines predictions concerning boundary permeability as a function of patch contrast (i.e., the magnitude difference in measures across interfaces), light level, and faunal mobility density, well relative rates emigration immigration.I assessed using invertebrate transfer macroalgal-seagrass-sand landscape, with

ABSTRACT Two‐dimensional hydrodynamic models are being used increasingly as alternatives to traditional one‐dimensional instream flow methodologies for assessing adequacy of and associated faunal habitat. modelling habitat has focused primarily on fishes, but fish‐based assessments may not model benthic macroinvertebrate effectively. We extend two‐dimensional techniques a assemblage in high‐elevation stream the Sierra Nevada (Dana Fork Tuolumne River, Yosemite National Park, CA, USA). This...

Six talitroidean amphipod species from terrestrial, semiterrestrial, fresh-water, and marine habitats were examined with scanning electron microscopy. A number of specialized ornate grooming organs are described in which cuticular scales setae have been modified into bristles, fans, combs, brushes. Terrestrial, aquatic groups possess modifications quite distinct each other, while individual species, within a single habitat group, differ much less. The structure function several nongrooming...

Fens and wet meadows are important mountain wetland types, but influences on assemblage structure of associated invertebrates poorly understood compared with other aspects the ecology these habitats. We sought to determine relative contributions terrestrial aquatic diversity abundance in wetlands, extent which invertebrate assemblages differ type, what degree vary as a function slow sheet flow. fens meadows, without flow, at 80 backcountry sites dispersed across 6200 km2 landscape Yosemite,...

Conclusions regarding disturbance effects in high elevation or latitude ecosystems based solely on infrequent, long-term sampling may be misleading, because the long winters erase severe, short-term impacts at height of abbreviated growing season. We separated a) pack stock grazing, manifested early season prior to arrival, from b) additional grazing that might become apparent during annual by use paired grazed and control wet meadows we sampled beginning end subalpine seasons. Control had...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 149:305-308 (1997) - doi:10.3354/meps149305 Delta13C variability of macroalgae: effects water motion baffling by seagrasses and mangroves France RL, Holmquist JG It has been argued that 13C-enrichment benthic compared pelagic consumers is a function differential diffusion resistance in boundary layer...

Collaborative efforts between indigenous peoples and government land managers are gaining recognition as important elements of forest restoration. Unique allocations, such the Research Natural Area (RNA) system US Forest Service, necessitate novel approaches to achieve desired outcomes among stakeholders. We describe a Traditional Ecological Knowledge (TEK) framework that integrates resource managers, tribal representatives, scientists, youth intern program conduct ecological restoration in...