USGCRP
Home ![]() ![]() ![]() ![]() |
| Search |
|
![]() |
By Ann Fisher |
![]() |
We conclude that if the regional climate becomes
generally warmer and wetter, as Figure 1 shows it is projected to do,
ecosystems and biodiversity will be adversely affected. However, the
region's diverse and highly integrated economy will offset some
detrimental effects. The vulnerability of the region's people and
other resources to major climate-induced impacts may be reduced because
agriculture is declining in the Mid-Atlantic Region (MAR) as elsewhere
for general economic reasons, and because people have access to varied
energy sources and food supplies, modern public health practices, and
climate-controlled environments in homes and workplaces. Ecological impacts
are expected to be most evident in the region's estuaries and coastal
zones. Climate change may lead to a less diverse mix of trees and/or
wildlife. Sixty-five percent of the Mid-Atlantic is covered by forests,
and climate change may reduce the dominance of northern hardwoods and
result in a different (possibly less diverse) mix of tree species. This
could change the types of habitat available for wildlife and affect
the profitability of the timber and pulpwood industries. The effects
on freshwater fisheries will be both negative and positive: There
will be less habitat for cold water species such as trout but more habitat
for warm water species such as bass. Overall biodiversity could decrease
if plants and animals are unable to migrate in pace with climate change,
especially where they face migration barriers (such as sea walls and
cities) and competition from invasive species.
The report calls for measures to improve the region's resilience to climate change and variability and to provide benefits regardless of climate change. Examples include flood and drought management, watershed-based water quality protection and methods to deter development of vulnerable or sensitive ecological areas, such as flood plains and coastal zones. These actions would benefit the region now. Despite these suggestions, concerns remain. For example, the costs and effectiveness of adaptive responses to climate change are not known, and the availability of financial resources for adaptation is uncertain -- showing the need for additional research. In addition, climate change is likely to cause permanent alterations in some aspects of the region's ecosystem structures and functions. For more information about the MARA: See http://www.essc.psu.edu/. The report can be downloaded from this site or obtained from Ann Fisher, AERS, PSU, 107 Armsby Building, University Park, PA 16802, 814-865-4143, fisherann@psu.edu. |
|