Preface: Purpose of this document & how to read the edits
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- Measure of success
- Expected Benefits: enhanced opportunities for eco-tourism richer species diversity Regulatory Needs
- Macroalgae Research Needs (2002)
Expected Benefits: enhanced opportunities for eco-tourism richer species diversity Related Actions: FW 2.5 FW 5.2 Challenge: Managing "nuisance" species 69% Substantial Nuisance species are typically native to an area but for some reason have either extended their populations or their season due to human impacts. Overabundance of macroalgae (seaweed) in the Delaware Inland Bays is a nuisance and has had impacts on water quality and living resources. The impact of macroalgae in Maryland's coastal bays is unknown. Increases in the resident (non-migratory) Canada goose population are causing nuisance problems in suburban areas from their fecal droppings which may have local impacts on water quality. Additionally, damage to agriculture habitats is occurring due to the presence and increase in resident Canada geese. They are depredating crops in the spring by pulling up seedling corn and soybeans. This is a growing problem. Another challenge is the overabundance of snow geese populations. The number of greater snow geese wintering in the coastal bays has increased dramatically during the past decade. Improved annual survival is due to an adaptation of feeding on agricultural waste grains. Increased gosling production due to favorable climatic changes on their arctic breeding grounds has outpaced the ability of hunters to harvest geese. Concentrations of snow geese are causing severe damage to coastal islands in Chincoteague Bay and in salt marshes in the Newport Bay vicinity. Canada is currently implementing strategies that will contribute to the overall management goal of doubling the harvest of greater snow geese. This in effect will reduce survival and stabilize the population at 1 million birds by 2002. There are no immediate plans to limit reproduction on the breeding grounds of greater snow geese. Modifications of hunting methods will be attempted first before more socially unacceptable approaches are used. Solution: Reduce impacts to water quality, native plant and animal habitats, and agriculture from "nuisance" species like macroalgae, resident Canada geese, and snow geese. See “Understanding the Role of Macroalgae in Shallow Estuaries” (2002) Measure of success: changes in rates of impacts from nuisance species Status: unknown Actions: DNR will discourage human activities and land management practices that promote undesirable species by educating the public (e.g., negative impacts of feeding waterfowl populations and providing 'sanctuary' ponds for geese to roost). Modify to have MCBP become lead for educational efforts. DNR will promote enhanced control of undesirable species (e.g., increasing hunting opportunities for greater snow geese and resident Canada geese on private lands). Institutionalized DNR and USFWS will form a task force (including the Farm Bureau, UMCE and others) to investigate options to control damage to marshes by snow geese, nutria, and others. Delete DNR will provide landowners with technical assistance to resolve nuisance and depredation problems caused by resident Canada geese. Institutionalized DNR will propose non-traditional hunting techniques (e.g., use of electronic calls, unplugged shotguns, and conservation hunts) for increasing the harvest of greater snow geese. Institutionalized DNR and USDA Wildlife Services will provide technical assistance to help harass geese, modify existing habitats, and plan landscapes to discourage goose use. Institutionalized Landowners, local governments, corporations, etc. should obtain state and federal permits to addle Canada goose and mute swan eggs and destroy mute swan nests in order to limit reproduction. Institutionalized DNR will work with Delaware to investigate the relationship between eutrophication and macroaglae abundances. See reference above. Supplemental – research & ecosystem monitoring Expected Benefits: enhanced opportunities for eco-tourism richer species diversity Regulatory Needs: Eliminate the lengthy federal and state permit process to enable landowners to addle Canada goose eggs and to take a limited number of geese during times when they are doing damage. Institute a Federal Depredation Order to legalize the taking of resident geese during a closed season to limit reproduction and resolve depredation problems. Macroalgae Research Needs (2002): The questions driving research were identified as: 1) why are macroalgae proliferating now? 2) What controls macroalgae blooms? 3) Can the increase in macroalgae be reversed? 4) What is fate of the macroalgal biomass? These questions lead to the following research priorities: 1. Explore and analyze existing data first. Examine winter nutrient concentrations for any trends. 2. Identify sources of nitrogen input. 3. Determine number and extent of any ‘hot spots’ of groundwater influx of nitrogen to the bays directly (thermal imagery). 4. Use isotopes (ä15N, radium isotopes in GW) and tissue C:N ratios. 5. Estimate biomass for existing species and compute community stocks. 6. Conduct hard substrate survey (bulkheads, canals, etc.). 7. Target sampling of biomass (e.g., canopy height) in seagrass beds to determine if any impact (light stress during critical periods) might be expected. 8. Determine fate of organic and inorganic nutrients derived from macroalgae decomposition, perhaps collaborating with the research teams for the Brown Tide ECOHAB project in VA.
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