Coral and Marine Ecosystems Studies
Research Guide

Ecological extinction from overfishing preceded pollution, habitat degradation, and climate change as the primary disturbance to coastal ecosystems, with historical abundances of large consumer species far exceeding recent observations. 'Historical Overfishing and the Recent Collapse of Coastal Ecosystems' (Jackson et al., 2001) documents this sequence based on long-term records.

Anthropogenic ocean acidification over the twenty-first century reduces seawater pH, impacting calcifying organisms like corals and shellfish by hindering shell formation. 'Anthropogenic ocean acidification over the twenty-first century and its impact on calcifying organisms' (Orr et al., 2005) models these effects under projected CO2 increases.

Coral reefs face rapid climate change and ocean acidification with atmospheric CO2 exceeding 500 ppm and temperatures rising at least 2°C by 2050-2100, conditions beyond the past 420,000 years. 'Coral Reefs Under Rapid Climate Change and Ocean Acidification' (Hoegh-Guldberg et al., 2007) details these thresholds for extant marine organisms.

Fishing down marine food webs shifted landings from long-lived, high trophic level piscivorous fish to short-lived, low trophic level invertebrates, with mean trophic levels declining from 1950 to 1994 per FAO data. 'Fishing Down Marine Food Webs' (Pauly et al., 1998) quantifies this global trend.

Estuarine and coastal ecosystems deliver services including storm protection, fisheries support, and nutrient cycling, with mangroves and coral reefs valued at specific economic rates where data exist. 'The value of estuarine and coastal ecosystem services' (Barbier et al., 2010) reviews these across marshes, mangroves, reefs, seagrasses, and beaches.

Increasing diversity, frequency, and scale of human impacts, combined with projected CO2 and temperature rises over the next 50 years, exceed conditions under which coral reefs flourished for the past half-million years. 'Climate Change, Human Impacts, and the Resilience of Coral Reefs' (Hughes et al., 2003) assesses global threats.