Articles tagged with Marine Ecosystems
A study by geneticists from Stanford and Harvard Universities reveals that humpback, fin, and minke whale populations in the North Atlantic were much higher before commercial hunting. The researchers estimated that there were around 800,000 to 900,000 whales, contradicting previous whaling records.
The study reveals that industrial fishing has reduced the resource base to less than 10% globally, threatening entire communities of large fish species. The authors urge international collaboration to restore fisheries and marine ecosystems to healthy levels, highlighting the need for action on a global scale.
Researchers are using innovative new tools to study coastal ecosystems, including genetic mapping of marine populations and remote ocean sensing. These tools are helping scientists understand the dynamics of ocean environments and track the movement of marine species.
Researchers find that coastal ecosystems are fragmented into smaller neighborhoods, with varying species distributions and abundance rates along the coast. The study uses innovative technologies to measure wave forces and track marine organism movement, shedding light on the complex dynamics of ocean ecosystems.
Researchers from PISCO integrate genetics, microchemistry, and computer mapping to understand coastal ecosystems. They discover coastal hotspots with abundant food and faster growth rates, and track larvae movements using mini-flight recorder technology.
The report highlights the urgent need to protect marine ecosystems from threats like overfishing, pollution, and climate change. Establishing large marine reserves can reverse these trends by providing a safe haven for species to thrive.
Scripps Institution researchers have developed a new approach for designing marine reserves in the Gulf of California, using optimization algorithms and ecological data. The study, published in Science, provides a mapped series of reserves that meet conservation goals while minimizing societal conflicts with fishing interests.
Paul Dayton, a renowned marine ecologist at Scripps Institution of Oceanography, has received the Diving Lifetime Achievement Award for his groundbreaking research on coastal and estuarine habitats. His work, including over 500 dives in Antarctica, has significantly advanced our understanding of Antarctic undersea ecology.
A new study by Oregon State University researchers found that removing any one species from a marine food web can have devastating effects, leading to population collapse and regional extinction. The study's findings highlight the importance of preserving biodiversity in marine ecosystems.
A $45 billion annual investment in preserving large tracts of wild nature could yield an annual return of $44 to $52 trillion in ecosystem services. The market economy fails to capture the full financial value of natural goods and services, leading to a lack of information and harmful development policies.
A recent study published in Science suggests that conserving wild nature can generate significant economic benefits, with intact ecosystems providing up to 75% more value than converted ones. The research estimates a global network of nature reserves could provide $4.4 trillion in additional economic benefits annually.
A University of Wisconsin-Madison study warns that industrial fishing poses significant risks to sharks, dolphins, and billfishes. The large, slow-growing animals are vulnerable to declines in populations due to increased fishing pressure.
The study found that only the Permian and Cretaceous extinction events led to significant changes in ocean ecosystem structure. The analysis suggests that life's evolution played a crucial role in shaping these ecosystems after the massive extinctions.
Researchers used satellite imagery to study the effects of an iceberg on a marine ecosystem in Antarctica. The study found that extensive ice cover reduced phytoplankton production by 40% and affected the entire food chain from krill to fish, seals, whales, penguins, and other species.
Large icebergs from Antarctica's Ross Ice Shelf are dramatically affecting the growth of minute plant life in the ocean, with a 40% reduction in phytoplankton blooms observed. The icebergs block normal drift of pack ice, reducing open water and altering the marine ecosystem.
Researchers measured unusually high biochemical activity on the canyon floor, with organic material enriching the deep-sea area. The sediment accumulates rapidly, leading to unstable floors and submarine mud avalanches every several decades to centuries.
A team of scientists from the University of Rhode Island and several institutions will develop new models to predict the impact of climate change on ocean ecosystems. The Partnership for Advancing Interdisciplinary Global Modeling (PARADIGM) aims to create global ocean models that can predict future states of the ocean.
Researchers from Texas A&M University embark on a voyage to understand the abundance and diversity of deep-sea microbes, estimated to number between 10-30% of Earth's biota. The JOIDES Resolution drillship samples cores containing these microbes from previously drilled sites in the eastern equatorial and southeast Pacific.
The University of Southern Mississippi has received a $6 million grant from the EPA to conduct research on coastal waters using bioindicators. The four-year project will measure estuary health and develop predictive indicators for coastal managers.
The LIFOU 2000 survey discovered nearly 3000 species of mollusc living in a mere 5000 ha area on Lifou, outperforming the entire Mediterranean region. This staggering diversity includes many rare and unknown species, with some seen only once or represented by single examples.
The RIDGE 2000 program will focus on the integration of research across a wide range of disciplines to study complex seafloor ecosystems and geological processes. With an investment of $27 million, the program aims to address questions that bridge gaps between disciplines.
Researchers will examine physical and biological processes in the Chukchi and Beaufort Seas to assess climate change impacts. They will analyze planktonic food web interactions and quantify export flux of particulate organic carbon.
The Georgia Tech/Goddard Global Ozone Chemistry Aerosol Radiation and Transport (GOCART) model accurately reproduces short-term and long-term variations in dust concentrations and distributions. The model provides five-day dust forecasts to warn people with respiratory problems and fisheries about potential red tides.
Researchers are conducting field studies on three Hawaiian islands to examine the origins and evolution of plant life on Earth. The team is collecting plant samples in various ecosystems to identify invasive species and determine their impact on native biodiversity.
Researchers will examine climate change's effects on ecosystems, societal perceptions, and natural resources in the United States. Key findings include vulnerabilities of specific regions and possible coping strategies for adapting to projected water and nutrient shortages.
Historical records show that humans exploited coastal resources thousands of years ago, leading to the decline of top predators and smaller species. Wise management strategies, such as restoring native oysters and promoting aquaculture, can help conserve water quality and create habitats for fish and shellfish.
The study highlights the loss of large predatory fish as a key factor in altering marine food webs, leading to changes in ecosystem composition. Historical records suggest that fishing impacts may have begun thousands of years ago, contributing to current ecosystem level changes.
Researchers examined paleoecological records, archaeological sites, and historical documents to calibrate their understanding of coastal marine ecosystems. They found that human disturbance led to changes in ecosystem structures and functions, with many species becoming ecologically extinct.
Global change poses significant environmental challenges, including climate change, biodiversity loss, and resource depletion. Scientists urge immediate action to address these issues, as human activities are transforming the Earth's environment at an unsustainable rate.
The Pew Fellows Program in Marine Conservation awards $150,000 to ten ocean ambassadors from five continents tackling pressing issues like marine pollution and coastal conservation. The 2000 recipients will conduct interdisciplinary projects applying sound science to urgent challenges.
Research suggests that rising CO2 levels may cause a 40% reduction in coral reef growth over the next 65 years. The team found no evidence of acclimation to reduced carbonate levels, highlighting the negative impact on coral reefs. This finding has significant implications for the increasing vulnerability of many reefs to other stressors.
Researchers successfully eliminated an invasive South African worm that was causing deformed shells and stunted growth in California's abalone. By removing susceptible snails and using the 'epidemic threshold of transmission theory,' they were able to break the parasite's cycle, offering a new glimmer of hope for conservation efforts.
New studies suggest ecosystems can be disrupted by small environmental changes or loss of minor species, challenging conventional wisdom on ecological protection. Research finds importance of both keystone and lesser species in ecosystem function.
Killer whales have begun preying on sea otters in western Alaska, leading to a decline in sea otter populations and an increase in sea urchin numbers. This chain of events is linked to the collapse of seals and sea lions, which are the killer whales' usual prey.
Salmon returns have fallen short of expectations in Alaska, with declines attributed to natural ocean cycles and potential regime shifts. Scientists attribute the changes to shifts in phytoplankton species composition and plankton abundance.
A 1996 hurricane study found that recovery rates increase with dispersal ability and size, while larger organisms are more resistant to moderate disturbance. The researchers also discovered that tidal surges can cause devastation on low-lying islands.
Researchers are studying the effects of the 1989 Exxon Valdez oil spill on Alaskan sea otter populations. Initial results indicate higher levels of an enzyme in otters living near the spill area, suggesting continued exposure to low levels of oil or other contaminants.
The Wildlife Conservation Society (WCS) is working to protect coral reefs worldwide through research, conservation, and management programs. WCS has been studying coral reefs in various locations, including the Belize Barrier Reef, where they have made significant progress with fishery replenishment zones and sea urchin control.