Coastal Ecosystems

Holly K. Ober

Emory H. Wellman, Bethany J. Lee, yAnna Braswell

In this publication, we describe methods commonly used to restore salt marshes, particularly those dominated by smooth cordgrass (Spartina alterniflora) and commonly found along the Gulf and East Coasts of the United States. This publication will be of particular use to land managers and property owners whose land includes salt marsh habitat. Restoration methods described here are discussed in an order reflecting increasing costs, effort, and spatial scale, meaning that methods most applicable to owners of small coastal properties will be listed first. We also provide a table summarizing the goal, advantages, and disadvantages of each method for quick reference.

Ashley R. Smyth, H. Dail Laughinghouse, Laura K. Reynolds, Edward V. Camp, and Karl Havens

Florida’s economically important estuaries could be heavily impacted by sea-level rise and altered river flow, both caused by climate change. The resulting higher salinity, or saltiness of the water, could harm plants and animals, alter fish, and bird habitat, and reduce the capacity of estuaries to provide such important services as seafood production and the protection of shorelines from erosion. This publication contains information for stakeholders, students, scientists, and environmental agencies interested in understanding how changes in salinity impact Florida’s estuaries.

Gabrielle Love, Anna Braswell, Angela B. Collins, and Edward Camp

Florida is experiencing many human and climate-related changes to the aquatic environment that can affect fish. Lost or altered habitat, for instance, can lead to changes in fish populations that may impact survival, growth, or recruitment of those populations. Recruitment influences how many adult fish are later available for spawning and continuing the population. Understanding recruitment and how it is affected by ecological influences is important for considering the potential effects of ongoing climate change, as well as restoration and management of water quality and habitat. This publication provides background information useful to anyone interested in understanding more about factors affecting fish populations and should be especially useful to Extension agents and management agency personnel who would like an overview of these topics before engaging with stakeholders.

Alexandra L. Bijak, Ashley R. Smyth, Savanna C. Barry, and Laura K. Reynolds

Vegetated coastal ecosystems, including mangroves, salt marshes, and seagrasses, store large amounts of carbon in plant biomass and underlying sediments, known as blue carbon. There is increasing interest among policymakers and natural resource managers in quantifying and monetizing the carbon stored in blue carbon ecosystems. However, carbon cycling in the marine and coastal environment is complex. This complexity and the logistical issues in accurately measuring blue carbon limit our ability to manage and restore blue carbon ecosystems as nature-based tools for climate change mitigation. This publication provides a general introduction to the processes that affect net carbon storage in blue carbon habitats and addresses implications for natural resource managers interested in quantifying net carbon storage.

Catherine Kaylor, Laura K. Reynolds, Shirley Baker, Angela B. Collins, Leslie Sturmer, yAshley Smyth

Hard clams provide many benefits to Florida’s coastal ecosystems beyond supporting the clam aquaculture industry. One of these benefits is improved water quality through filtration and nutrient cycling. However, both pollution and overharvesting have led to a decline in native clam populations for many areas, resulting in a growing interest among restoration practitioners to rebuild clam populations. There are two clam species native to Florida currently used in restoration: the northern hard clam, Mercenaria mercenaria, and the southern hard clam, Mercenaria campechiensis. This publication is intended for academics, restoration practitioners, and policy makers interested in shellfish restoration. The goal of this document is to describe the similarities and differences between these two species and to serve as a resource for selecting the best hard clam for a restoration project.

Paul M. Duff, Emory H. Wellman, yAnna Braswell

Florida is home to multiple mangrove species, including black mangroves, white mangroves, and red mangroves. Black and red mangroves have expanded their range along the Atlantic and Gulf Coasts in Florida as winter temperatures have increased and sea levels have risen, increasing their abundance and even converting salt marshes into mangrove forests. There are several factors that dictate mangrove migration on Florida’s coastlines. This publication is intended to educate the public and land managers about the factors driving mangrove range expansion. Though all the mangrove species listed above have been expanding their northern range limit, for the purposes of this publication, we will focus on the range expansion of black mangroves, which are more prevalent than other mangrove species.

Brittany L. Bird, Deborah L. Miller, Margo A. Stoddard, Lyn C. Branch, and Mark E. Hostetler

A UF/IFAS numbered Fact Sheet.