Saving Seafood

UMCES report: Low health scores rain on Chesapeake Bay’s recovery

May 23, 2019 — A year of historically heavy rainfall strained the Chesapeake Bay’s ecosystem — but not past the breaking point, according to a wide-ranging assessment released Tuesday.

The estuary’s overall health score in 2018 dropped from 54% to 46% but retained its “C” grade for a seventh consecutive year, according to the University of Maryland Center for Environmental Science’s latest report card.

It marked the lowest grade since 2013 and reversed a streak of four years of improving or steady scores.

“We don’t have as good of news to report because of some record rainfall,” said Bill Dennison, UMCES vice president for science application. “The good news is it took a hit, but it did not crash.”

The federal government and the states within the 64,000-square-mile Bay watershed are working on a plan to reduce nutrient and sediment pollution under an agreement signed in 2010. The effort faces a 2025 deadline.

The resilience of that recovery faced one of its biggest tests last year. About 72 inches of rain inundated the Baltimore area during 2018, about 30 inches more than normal, according to the report.

From a scientific perspective, the deluge offered a glimpse of how the recovering ecosystem may respond as climate change leads to increasingly erratic weather, Dennison said.

Many scientists predicted that last year’s rains would dampen the restoration gains. The UMCES report bears out those projections, showing reductions in the scores for water clarity, nitrogen, phosphorus and aquatic grasses.

Read the full story at the Bay Journal

Chesapeake Bay health dips, but still rates a C in annual report card

May 22, 2019 — Bay health took a hit from record rainfall last year, but experts claim the Chesapeake’s growing resilience managed to keep a bad situation from getting worse.

The 2018 Chesapeake Bay Report Card was released by the University of Maryland Center for Environmental Science, one of several groups that assess the bay’s health each year. It put the bay’s overall score at 46% — a drop from the previous year’s 54%, but still a C on its 20-point grading scale.

Bay resilience is critical because very wet years may no longer be an anomaly. Climate models predict an increase in weather extremes, and local marine experts are seeing some evidence of that.

“We’re encouraged that, in spite of the fact that we had a major insult to the bay with all the runoff and rainfall in 2018, that we took a dip but we didn’t crash,” said Bill Dennison, vice president for science applications at the center.

“Many of the living resources appear to be fairly resilient,” said Mark Luckenbach, associate director for research and advisory services at the Virginia Institute of Marine Science. “But we need to understand that that’s likely to become more frequent — these really high rainfall events.”

VIMS, affiliated with the College of William and Mary, collected much of the data used to compile the report, particularly for bay-wide seagrass, Virginia fish and blue crabs.

Read the full story at The Daily Press

Healthy fisheries and aquatic grasses fuel Chesapeake Bay recovery

June 19, 2018 — Booming aquatic grasses and bellwether fisheries are driving sustained progress in Chesapeake Bay health, which experts say is finally showing “significant” overall improvement.

The 2017 Chesapeake Bay Report Card issued by Virginia and Maryland rates the estuary a C for the third straight year as recovery holds steady or improves in five of seven indicators, the James River nails a B- for the first time and the fisheries index scores its first-ever A+.

Experts call their assessment “important evidence that the positive trend in ecosystem health is real” and that cleanup efforts across the watershed are working.

“It is the first time that the … scores are significantly trending in the right direction,” said Bill Dennison at the University of Maryland Center for Environmental Science in a statement Friday. “We have seen individual regions improving before, but not the entire Chesapeake Bay.”

The UMCES compiled the report card along with the Virginia Institute of Marine Science in Gloucester Point, the Virginia Department of Environmental Quality and other governmental agencies and academic groups both in this state and Maryland. This is the 12th year of its release.

The fisheries index is comprised of the average score for blue crab, striped bass and bay anchovy indicators. These species are considered ecologically, economically and socially important to the bay.

Last year’s fisheries index was 90 percent. This year, it rose to 95 percent, the highest ever recorded for the annual reports — the average of 100 percent for striped bass and blue crab, and 84 percent for bay anchovy.

Read the full story at the Daily Press

 

Chesapeake Bay health improves in 2015

May 18, 2016 — The overall health of Chesapeake Bay improved in 2015, according to scientists at the University of Maryland Center for Environmental Science. The largest estuary in the nation scored a C (53%) in 2015, one of the three highest scores since 1986. Only 1992 and 2002 scored as high or higher, both years of major sustained droughts.

“We’d expect to see improvements after a drought year because nutrients aren’t being washed into the Bay, fueling algae blooms and poor water quality,” said Bill Dennison, Vice President for Science Applications at the University of Maryland Center for Environmental Science. “However, in 2015 stream flow was below normal, but nowhere near the drought conditions in 1992 and 2002. Thus, the high score for 2015 indicates that we’re making progress reducing what’s coming off the land.”

The overall score for the Chesapeake Bay Health Index for 2015 was 53%, compared with 50% in 2014 and 45% in 2013. There were strong improvements in many regions throughout the Bay, such as the Choptank River, Upper Eastern Shore, Lower Western Shore, and the Rappahannock River. There were no regions that had lower scores in 2015 compared to 2014. Improvements could be related to a number of factors, including several years of moderate weather, sewage treatment upgrades, use of winter cover crops by farmers, and reductions in atmospheric nitrogen deposition.

Read the full story at Science Daily