Seagrass production around artificial reefs is resistant to human stressors
Artificial reefs might help to restore the ocean’s ability to fight against climate change. The reefs boost the productivity of seagrass meadows by attracting fish, which can improve the ability of these habitats to lock up more carbon dioxide beneath the waves. Breeze blocks placed in one of the ocean’s most endangered habitats provide an […]
How eelgrass spread around the world
Seagrasses evolved from freshwater plants and use sunlight and carbon dioxide (CO2) for photosynthesis and are able to thrive in depths down to 50 meters. In contrast to algae, they possess roots and rhizomes that grow in sandy to muddy sediments. The grass-like, leaf-shoots produce flowers and complete their life cycle entirely underwater. Seeds are […]
Green sea turtles have traveled to the same seagrass to eat for 3,000 years
For approximately 3,000 years, generations of green sea turtles have returned to the same seagrass meadows to eat. This was discovered by Willemien de Kock, a historical ecologist at the University of Groningen, by combining modern data with archaeological findings. Sea turtles migrate between specific breeding places and eating places throughout their lives–this much was […]
Caribbean seagrasses provide services worth $255B annually, including vast carbon storage
Discussions of valuable but threatened ocean ecosystems often focus on coral reefs or coastal mangrove forests. Seagrass meadows get a lot less attention, even though they provide wide-ranging services to society and store lots of climate-warming carbon. But the findings of a new University of Michigan-led study show that seagrass ecosystems deserve to be at […]
Study reveals widgeongrass has replaced eelgrass as the dominant seagrass species in Chesapeake Bay
Mangroves are growing in areas historically dominated by salt marshes and oyster reefs. Invasive pacific oysters are replacing native blue mussels in the Wadden Sea. Macroalgae are exhibiting dominance over hard corals in the Caribbean and Indo-Pacific. Climate change-driven shifts in dominant, habitat-forming species such as these can have significant implications for conservation, and this […]
What causes decline of tropical seagrass meadows?
Seagrass, a group of aquatic angiosperms, grows in shallow waters in the coastal sea and contributes most of the primary production while participating in many important ecological processes. Heat stress threatens the survival of seagrass, but its damage mechanisms are unclear. Recently, a research team led by Prof. Liu Jianguo from the Institute of Oceanology […]
Fauna return rapidly in planted seagrass meadows, study shows
A study of eelgrass meadows planted by researchers from the University of Gothenburg shows that fauna return rapidly once the eelgrass has started to grow. Already after the second summer, the biodiversity in the planted meadow was almost the same as in old established eelgrass meadows. Eelgrass meadows have declined heavily in southern Bohus county […]
Seagrass meadows show resilience to ‘bounce back’ after die-offs
In Florida alone, thousands of acres of marine seagrass beds have died. Major seagrass die-offs also are occurring around the world. Stressors such as high temperature, hypersalinity and hypoxia or lack of oxygen affect seagrasses’ ability to resist and recover from these stressor-related mortality events or when disturbances lead to seagrass die-off events. Seagrass die-offs […]
Visiting one of the worlds most remote seagrass meadows
Eva Rothausler On a narrow stretch along the northern-central coast of Chile, the seagrass Heterozostera nigricaulis (syn. Zostera nigricaulis, Heterozostera tasmanica) occurs in three isolated patches no more than 300 km apart. It is a common intertidal to subtidal seagrass in the Zosteracea family and is found growing in protected and soft-bottom areas. Heterozostera nigricaulis […]
Seagrass crucial to stemming the tide of coastal erosion
The sea devours large tracts of land when storms wash sand out to sea from the coast. A new study involving a researcher from the University of Gothenburg has shown that seagrass can reduce cliff erosion by up to 70% thanks to its root mats binding the sand. Coastal erosion is a global problem that […]