نتایج جستجو برای: bioerosion
تعداد نتایج: 172 فیلتر نتایج به سال:
Coral bleaching events and resultant changes in benthic community composition population size structure can diminish the important geo-ecological functions reefs provide, including habitat provision carbonate production to support reef accretion. Net budgets, balance between erosion processes, are thus functional indicators of health. This study quantifies coral colony structures, budget trajec...
Growth rates of the major Caribbean reef framework-building coral Orbicella spp. decrease with increasing water depth and light attenuation. However, reliable, spatially distributed growth rates for corals deeper than 30 m are rare, and the combined influence of coral framework accretion, secondary framework accretion, and framework macroboring on net framework calcification in these habitats i...
Although the Neuquén Basin (Argentina) has an extensive record of fossil vertebrates for Upper Cretaceous, little is known about Early Cretaceous vertebrate faunas. The Mulichinco Formation (early Valanginian), where some dinosaur bone sites were found, provides important additional insights into composition continental fauna that age. osteological studies sauropod and theropod dinosaurs have b...
Invertebrates are important sediment engineers, making up for their small body size with abundance and behavioral diversity. However, despite the recognized importance of invertebrates as engineers in terrestrial marine environments, zoogeomorphology rivers has primarily considered larger taxa, such fish beaver. This article reviews zoogeomorphic effects freshwater habitats, a focus on rivers. ...
چکیده ندارد.
Abstract Modern coral reefs face substantial threats that endanger their capacity to function and provide resources for human populations. Chronic pressure through exploitation land-based pollution has led reef degradation lower productivity. More recently, this is compounded with successive episodes of bleaching across the tropical oceans. However, response trajectories exploitation, habitat d...
It is generally a challenge to interpret incomplete and degraded skeletal assemblages found during archaeological excavations. Several events after the death of animals and humans, before and after burial, will have influenced the situation as seen upon excavation. This post-mortem sequence of events can be called the taphonomic history of bones. Taphonomic signatures detected using histology c...
Marine tidal notches are developed by bioerosion in the intertidal zones of rocky coasts, but a combination of sea-level change and crustal movements can result in them being raised above or submerged below the water line. For that reason, the present-day elevation of these former shorelines relative to mean sea level has long been used to quantify relative coastal uplift and subsidence in tect...
The environmental processes that prevent reef framework development in areas with a diverse and dense cover of coral were investigated in the southern Arabian Gulf (Dubai, UAE), the southwestern Indian Ocean (South Africa) and the central Caribbean (Cayman Islands, BWI). In Dubai, temperature anomalies predicted to recur every 10-15 yr cause repeated mass mortalities of Acropora spp., the domin...
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