Geukensia demissa | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Bivalvia |
Order: | Mytilida |
Family: | Mytilidae |
Genus: | Geukensia |
Species: | G. demissa |
Binomial name | |
Geukensia demissa (Dillwyn, 1817) | |
Synonyms | |
Modiolus demissus(Dillwyn) |
Geukensia demissa is a species of mussel, a marine bivalve mollusk in the family Mytilidae, the true mussels. This species is native to the Atlantic coast of North America. The common names for this species include ribbed mussel, Atlantic ribbed marsh mussel and ribbed horsemussel. [1] However, the common name ribbed mussel is also used for the Southern Hemisphere mussel Aulacomya atra . The appearance of the shell is grooved and oval in shape. The interior of this mussel is tinted purple.
The ribbed shells of this species usually attain a length of 10 cm length, and can be as large as 13 cm. [1] Age can be determined by counting dark growth rings on the shell and mussels typically live 10 – 15 years, but more advanced ages are not uncommon. [2]
The ribbed mussel occurs in the coastal waters of salt marsh habitats from the southern Gulf of St. Lawrence in eastern Canada, south along the western Atlantic coast to Florida. In the Gulf of Mexico this species is replaced by the southern ribbed mussel, Geukensia granosissima , and the two species hybridize in southern Florida. [3]
The ribbed mussel has been introduced to Texas, Mexico, California, and Venezuela. [1]
Ribbed mussels live in the intertidal zone, attached to hard surfaces or embedded in sediment with the help of their byssal threads. They are typically found in salt marshes where they form dense aggregations with the marsh cordgrass ( Spartina alterniflora ) and each other since aggregating decreases an individual's chance of being preyed on. [4]
Ribbed mussels are highly affected by small variations in temperature which makes their placement in the marsh important due to how variable temperature can be in salt marshes. Mussels that are in dense Spartina patches tended to be warmer than those who were not, and the amount of air flow that mussels receive can make a difference as well. Their position in the depth of the sediment also effects their internal body temperature. [5]
Another example of how important microhabitats are for ribbed mussels is tidal height. In higher tidal zones, ribbed mussels do not grow to full potential and there are few out there; however, they tend to be live long and have a better chance of survival. [4]
Ribbed mussels face more predation on marsh edges as well. Some of their predators include birds, raccoons, and blue crabs. [6]
Ribbed mussels are dioecious and sexes can only be determined histologically. [7]
They reproduce once per year in Connecticut [7] and South Carolina, [8] however in an introduced population in Venezuela two spawning peaks have been observed. [9]
Mussels >15 mm are typically reproductive; however, it is not uncommon for mussels up to 35 mm to have no signs of gametogenesis. Their location in the salt marsh plays a role in when they become reproductive because edge ribbed mussels mature at smaller body sizes compared to other mussels. [10]
Ribbed mussel larvae return to the marsh during recruitment, and they tend to settle near marsh edges where there are adult ribbed mussels. [11]
The ribbed mussel is primarily a filter feeder, and they help to clean said area of bacteria, parasites, and heavy metals. [12] They feed on phytoplankton, bacteria, and non flagellates to gain nutrients. [13]
The speed at which ribbed mussels feed changes with temperature which is partially due to the availability of their food, and they feed more when their environment is warmer. Location also plays a role in filtration rates due to food quality and availability. [14]
Ribbed mussels and other shellfish are able to store nutrients in the bodies and shells, through a process that may also remove toxins from the environment, [15] and they can be used as bioindicators for certain pollutants like coliform bacteria. [16] Ribbed mussels have been found with heavy metals in their tissues which suggests that they can filter such toxins out of the ecosystem. They also feed on algae, so they could be used to prevent harmful algal blooms. [15]
Spartina grasses benefit from the presence of mussels because ribbed mussels increase nutrients in sediment that Spartina need to grow. For example, mussels contribute bioavailable nitrogen in their pseudofeces. When ribbed mussels form mussel mounds, they are able to stabilize the ground to make it easier for Spartina to grow on. [17]
Native Americans near the Jamestown settlement manufactured shell beads that were called "rawrenock" in the local Powhatan language. The production process involved grinding broken ribbed mussel shells into disk-shaped beads and drilling a central hole to string the jewelry with. Surviving examples were recovered from the refuse that filled an abandoned well within the James Fort. [18]
A salt marsh, saltmarsh or salting, also known as a coastal salt marsh or a tidal marsh, is a coastal ecosystem in the upper coastal intertidal zone between land and open saltwater or brackish water that is regularly flooded by the tides. It is dominated by dense stands of salt-tolerant plants such as herbs, grasses, or low shrubs. These plants are terrestrial in origin and are essential to the stability of the salt marsh in trapping and binding sediments. Salt marshes play a large role in the aquatic food web and the delivery of nutrients to coastal waters. They also support terrestrial animals and provide coastal protection.
The blue mussel, also known as the common mussel, is a medium-sized edible marine bivalve mollusc in the family Mytilidae, the mussels. Blue mussels are subject to commercial use and intensive aquaculture. A species with a large range, empty shells are commonly found on beaches around the world.
Sporobolus alterniflorus, or synonymously known as Spartina alterniflora, the smooth cordgrass, saltmarsh cordgrass, or salt-water cordgrass, is a perennial deciduous grass which is found in intertidal wetlands, especially estuarine salt marshes. It has been reclassified as Sporobolus alterniflorus after a taxonomic revision in 2014, but it is still common to see Spartina alterniflora and in 2019 an interdisciplinary team of experts coauthored a report published in the journal Ecology supporting Spartina as a genus. It grows 1–1.5 m tall and has smooth, hollow stems that bear leaves up to 20–60 cm long and 1.5 cm wide at their base, which are sharply tapered and bend down at their tips. Like its relative saltmeadow cordgrass S. patens, it produces flowers and seeds on only one side of the stalk. The flowers are a yellowish-green, turning brown by the winter. It has rhizoidal roots, which, when broken off, can result in vegetative asexual growth. The roots are an important food resource for snow geese. It can grow in low marsh as well as high marsh, but it is usually restricted to low marsh because it is outcompeted by salt meadow cordgrass in the high marsh. It grows in a wide range of salinities, from about 5 psu to marine, and has been described as the "single most important marsh plant species in the estuary" of Chesapeake Bay. It is described as intolerant of shade.
Ecological facilitation or probiosis describes species interactions that benefit at least one of the participants and cause harm to neither. Facilitations can be categorized as mutualisms, in which both species benefit, or commensalisms, in which one species benefits and the other is unaffected. This article addresses both the mechanisms of facilitation and the increasing information available concerning the impacts of facilitation on community ecology.
Intertidal ecology is the study of intertidal ecosystems, where organisms live between the low and high tide lines. At low tide, the intertidal is exposed whereas at high tide, the intertidal is underwater. Intertidal ecologists therefore study the interactions between intertidal organisms and their environment, as well as between different species of intertidal organisms within a particular intertidal community. The most important environmental and species interactions may vary based on the type of intertidal community being studied, the broadest of classifications being based on substrates—rocky shore and soft bottom communities.
High salt marsh dieback, or salt marsh browning, is the primary force in salt marsh degradation in the high marsh. The general effect is that the plants in the marsh die off and brown, leaving dead organic matter, and ultimately open sediment. Without strong plant roots holding the sediment, these open areas of land erode, causing the salt marsh to retreat back to the mainland. Dieback zones lack their main producers, such as the salt marsh cord grass, or Spartina alterniflora, and ultimately become completely unproductive.
The Coastal and Estuarine Research Federation (CERF) is a private, nonprofit organization created in 1971. At that time, the members of two regionally based organizations, the Atlantic Estuarine Research Society (AERS) and the New England Estuarine Research Society (NEERS) recognized the need for a third estuarine organization that would address national estuarine and coastal issues. Today, CERF is a multidisciplinary federation of members and seven regionally-based Affiliate Societies dedicated to the understanding and wise stewardship of estuaries and coasts worldwide.
Littoraria irrorata, also known by the common name the marsh periwinkle, is a species of sea snail, a marine gastropod mollusk in the family Littorinidae. The specific epithet irrorata means 'moistened' or 'dewy.'
Low marsh is a tidal marsh zone located below the Mean Highwater Mark (MHM). Based on elevation, frequency of submersion, soil characteristics, vegetation, microbial community, and other metrics, salt marshes can be divided to into three distinct areas: low marsh, middle marsh/high marsh, and the upland zone. Low marsh is characterized as being flooded daily with each high tide, while remaining exposed during low tides.
Choromytilus meridionalis, the black mussel, is a species of bivalve. It is a marine mollusc in the family Mytilidae. They are part of the Phylum Mollusca which is the second-largest phylum of invertebrates with around 85,000 species. In this article, we will be discussing the taxonomy, morphology, ecology, reproduction, and distribution of Choromytilus meridionalis.
Bathymodiolus childressi is a species of deepwater mussel, a marine bivalve mollusk species in the family Mytilidae, the mussels.
Geukensia is a genus of marine bivalve mollusc in the Mytilidae family, naturally found in the western Atlantic.
The William T. Davis Wildlife Refuge (WTDWR) is an 814-acre (3.29 km2) wildlife refuge straddling the New Springville and Travis sections of Staten Island. The park was named in honor of Staten Island native William T. Davis, a renowned naturalist and entomologist who along with the Audubon Society started the refuge with an original acquisition of 52 acres (210,000 m2). Additional acreage was acquired in increments and the park is today 814 acres (3.29 km2). Beginning in 2010, the adjacent 223-acre (0.90 km2) North Park section of Freshkills Park has undergone preparation to serve as an expansion of the wildlife refuge.
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