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Frequency of extreme freeze events controls the distribution and structure of black mangroves (Avicennia germinans) near their northern range limit in coastal Louisiana Aim Climate change is expected to result in the tropicalization of coastal wetlands in the northern Gulf of Mexico, as warming winters allow tropical mangrove forests to expand their distribution poleward at the expense of temperate salt marshes. Data limitations near mangrove range limits have hindered understanding of the effects of winter temperature extremes on mangrove distribution and structure. Here, we investigated the influence of extreme freeze events on the abundance, height and coverage of black mangroves (Avicennia germinans ) near their northern range limit in Louisiana. Location Coastal Louisiana, USA. Methods We quantified the relationships between the frequency of extreme freeze events and A. germinans... Categories: Publication; Types: Citation Rapidly changing range limits in a warming world: Critical data limitations and knowledge gaps for advancing understanding of mangrove range dynamics in the Southeastern USA Abstract (from Springer): Climate change is altering species’ range limits and transforming ecosystems. For example, warming temperatures are leading to the range expansion of tropical, cold-sensitive species at the expense of their cold-tolerant counterparts. In some temperate and subtropical coastal wetlands, warming winters are enabling mangrove forest encroachment into salt marsh, which is a major regime shift that has significant ecological and societal ramifications. Here, we synthesized existing data and expert knowledge to assess the distribution of mangroves near rapidly changing range limits in the southeastern USA. We used expert elicitation to identify data limitations and highlight knowledge gaps for... Categories: Publication; Types: Citation Final Memo for Ecological Implications of mangrove forest migration in the southeasten U.S Winter climate change has the potential to have a large impact on coastal wetlands in the southeastern United States. Warmer winter temperatures and reductions in the intensity of freeze events would likely lead to mangrove forest range expansion and salt marsh displacement in parts of the U.S. Gulf of Mexico and Atlantic coast. The objective of this research was to better evaluate the ecological implications of mangrove forest migration and salt marsh displacement. The potential ecological impacts of mangrove migration are diverse, ranging from important biotic impacts (e.g., coastal fisheries, land bird migration; colonial-nesting wading birds) to ecosystem stability (e.g., response to sea-level rise and drought;... Tags: Forests, Grasslands and Plains, Landscapes, Sea-Level Rise and Coasts, Southeast CASC, All tags... Southeastern United States, Water, Coasts and Ice, Wetlands, climate change, mangrove forest, Fewer tags Changes in Ecosystem Nitrogen and Carbon Allocation with Black Mangrove (Avicennia germinans) Encroachment into Spartina alterniflora Salt Marsh Abstract (from Ecosystems): Increases in temperature are expected to facilitate encroachment of tropical mangrove forests into temperate salt marshes, yet the effects on ecosystem services are understudied. Our work was conducted along a mangrove expansion front in Louisiana (USA), an area where coastal wetlands are in rapid decline due to compounding factors, including reduced sediment supply, rising sea level, and subsidence. Marsh and mangrove ecosystems are each known for their ability to adjust to sea-level rise and support numerous ecosystem services, but there are some differences in the societal benefits they provide. Here, we compare carbon and nitrogen stocks and relate these findings to the expected effects... Categories: Publication; Types: Citation Final Report-Landscape conservation design for enhancing the adaptive capacity of coastal wetlands in the face of sea-level rise and coastal development Coastal wetlands provide many valuable benefits to people and wildlife, including critical habitat, improved water quality, reduced flooding impacts, and protected coastlines. However, in the 21st century, accelerated sea-level rise and coastal development are expected to greatly alter coastal landscapes across the globe. The future of coastal wetlands is uncertain, challenging coastal environmental managers to develop conservation strategies that will increase the resilience of these valuable ecosystems to change and preserve the benefits they provide. One strategy for preparing for the effects of sea-level rise is to ensure that there is space available for coastal wetlands to migrate inland. In a recent study,... Tags: Final Report, Sea-Level Rise and Coasts, South Central CASC, Southeast CASC, Water, Coasts and Ice, All tags... Wetlands, coastal wetlands, landward migration, sea-level rise, Fewer tags Restoring Texas Coastal Wetlands: Decision Support for the Beneficial Use of Dredged Material Coastal wetland loss is a serious concern along the northern Gulf of Mexico, especially in Texas and Louisiana where rates of wetland loss and relative sea-level rise are among the highest in the world, extreme storms are becoming more frequent, and flooding events are intensifying. Because coastal wetlands of the northern Gulf of Mexico provide numerous ecosystem services, including providing critical habitat for species of concern such as the whooping crane and the mottled duck, federal, state, and local agencies have made significant efforts to restore habitats to increase their resilience to sea-level rise and extreme storm events. One way to help wetlands adapt to sea-level rise and extreme flooding events... Categories: Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2023, CASC, Data Visualization & Tools, Data Visualization & Tools, Projects by Region, All tags... Science Tools for Managers, Science Tools for Managers, Sea-Level Rise and Coasts, Sea-Level Rise and Coasts, South Central, South Central CASC, Water, Coasts and Ice, Water, Coasts and Ice, Wetlands, Wetlands, Fewer tags Final Report: Identifying the Ecological and Management Implications of Mangrove Migration in the Northern Gulf of Mexico Climate change is transforming ecosystems and affecting ecosystem goods and services. Along the Gulf of Mexico and Atlantic coasts of the southeastern United States, the frequency and intensity of extreme freeze events greatly influences whether coastal wetlands are dominated by freeze-sensitive woody plants (mangrove forests) or freeze-tolerant grass-like plants (salt marshes). In response to warming winters, mangroves have been expanding and displacing salt marshes at varying degrees of severity in parts of north Florida, Louisiana, and Texas. As winter warming accelerates, mangrove range expansion is expected to increasingly modify wetland ecosystem structure and function. Because there are differences in the... Categories: Publication; Types: Citation Aboveground Allometric Models for Freeze-Affected Black Mangroves (Avicennia germinans): Equations for a Climate Sensitive Mangrove-Marsh Ecotone Abstract (from http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0099604): Across the globe, species distributions are changing in response to climate change and land use change. In parts of the southeastern United States, climate change is expected to result in the poleward range expansion of black mangroves ( Avicennia germinans) at the expense of some salt marsh vegetation. The morphology of A. germinans at its northern range limit is more shrub-like than in tropical climes in part due to the aboveground structural damage and vigorous multi-stem regrowth triggered by extreme winter temperatures. In this study, we developed aboveground allometric equations for freeze-affected black mangroves which... Categories: Publication; Types: Citation; Tags: Forests, Grasslands and Plains, Landscapes, Sea-Level Rise and Coasts, Southeast CASC, All tags... Water, Coasts and Ice, Wetlands, coastal ecology, ecosystems, leaves, mangrove swamps, marshes, trees, wetlands, winter, Fewer tags Local sea level rise information sheets for Texas, Louisiana, Mississippi, Alabama and Florida This project represents a collaboration between individuals at the U.S. Geological Survey’s (USGS) Wetland and Aquatic Research Center, the Northern Gulf of Mexico Sentinel Site Cooperative, and the U.S. Fish and Wildlife Service (USFWS) to produce customized two-pager information sheets for 54 federal coastal refuges, parks, and reserves across the northern Gulf of Mexico (i.e., sea-level rise sensitive federally-managed lands within Texas, Louisiana, Alabama, Mississippi, and Florida). The project team included Bogdan Chivoiu (Cherokee Nation Technologies at USGS), Michael Osland (USGS), Renee Collini (Northern Gulf of Mexico Sentinel Site Cooperative), Sara Martin (Northern Gulf of Mexico Sentinel Site Cooperative),... Tags: Alabama, Estuarine Coastal, Estuarine Coastal Intertidal, Florida, Gulf of Mexico, All tags... Louisiana, Mississippi, Sea-Level Rise and Coasts, Southeast CASC, Texas, Water, Coasts and Ice, parks, Fewer tags The impacts of mangrove range expansion on wetland ecosystem services in the southeastern United States: Current understanding, knowledge gaps, and emerging research needs Abstract (from Global Change Biology): Climate change is transforming ecosystems and affecting ecosystem goods and services. Along the Gulf of Mexico and Atlantic coasts of the southeastern United States, the frequency and intensity of extreme freeze events greatly influence whether coastal wetlands are dominated by freeze-sensitive woody plants (mangrove forests) or freeze-tolerant grass-like plants (salt marshes). In response to warming winters, mangroves have been expanding and displacing salt marshes at varying degrees of severity in parts of north Florida, Louisiana, and Texas. As winter warming accelerates, mangrove range expansion is expected to increasingly modify wetland ecosystem structure and function.... Categories: Publication; Types: Citation U.S. Gulf of Mexico coast (TX, MS, AL, and FL) Macroclimate Vegetation Data Section 1 (2013-2014) The northern Gulf of Mexico coast spans two major climate gradients and represents an excellent natural laboratory for developing climate-influenced ecological models. In this project, we used these zones of remarkable transition to develop macroclimate-based models for quantifying the regional responses of coastal wetland ecosystems to climate variation. In addition to providing important fish and wildlife habitat and supporting coastal food webs, these coastal wetlands provide many ecosystem goods and services including clean water, stable coastlines, food, recreational opportunities, and stored carbon. Our objective was to examine and forecast the effects of macroclimatic drivers on wetland ecosystem structure... Categories: Data; Types: Citation; Tags: Corpus Christi, Galveston, Grand Bay, Gulf of Mexico, Laguna Madre, All tags... Port Aransas, San Antonio, Sea-Level Rise and Coasts, Slidell, South Central CASC, State of Alabama, State of Florida, State of Louisiana, State of Mississippi, State of Texas, Tampa Bay, Ten Thousand Islands, Water, Coasts and Ice, Weeks Bay, Wetlands, environment, vegetation, vegetation, Fewer tags U.S. Gulf of Mexico coast (TX, MS, AL, and FL) Macroclimate Landscape and Climate Data (2013-2014) The northern Gulf of Mexico coast spans two major climate gradients and represents an excellent natural laboratory for developing climate-influenced ecological models. In this project, we used these zones of remarkable transition to develop macroclimate-based models for quantifying the regional responses of coastal wetland ecosystems to climate variation. In addition to providing important fish and wildlife habitat and supporting coastal food webs, these coastal wetlands provide many ecosystem goods and services including clean water, stable coastlines, food, recreational opportunities, and stored carbon. Our objective was to examine and forecast the effects of macroclimatic drivers on wetland ecosystem structure... Categories: Data; Types: Citation; Tags: Corpus Christi, Galveston, Grand Bay, Gulf of Mexico, Laguna Madre, All tags... Port Aransas, San Antonio, Sea-Level Rise and Coasts, Slidell, South Central CASC, State of Alabama, State of Florida, State of Louisiana, State of Mississippi, State of Texas, Tampa Bay, Ten Thousand Islands, Water, Coasts and Ice, Weeks Bay, Wetlands, climate, climate, elevation, elevation, landscape, landscape, latitude, latitude, longitude, longitude, Fewer tags Climatic Controls on the Distribution of Foundation Plant Species in Coastal Wetlands of the Conterminous United States: Knowledge Gaps and Emerging Research Needs Abstract (from SpringerLink): Foundation plant species play a critical role in coastal wetlands, often modifying abiotic conditions that are too stressful for most organisms and providing the primary habitat features that support entire ecological communities. Here, we consider the influence of climatic drivers on the distribution of foundation plant species within coastal wetlands of the conterminous USA. Using region-level syntheses, we identified 24 dominant foundation plant species within 12 biogeographic regions, and we categorized species and biogeographic regions into four groups: graminoids, mangroves, succulents, and unvegetated. Literature searches were used to characterize the level of research directed... Categories: Publication; Types: Citation; Tags: Forests, Grasslands and Plains, Landscapes, Sea-Level Rise and Coasts, Southeast CASC, All tags... Water, Coasts and Ice, Wetlands, Fewer tags Linear and nonlinear effects of temperature and precipitation on ecosystem properties in tidal saline wetlands Tags: Forests, Grasslands and Plains, Landscapes, Publication, Sea-Level Rise and Coasts, All tags... Southeast CASC, Southeast CASC, Water, Coasts and Ice, Wetlands, biomass, canopy height, climate change, coastal wetland, mangrove forest, nonlinear, precipitation, productivity, salt marsh, soil carbon, temperature, threshold, Fewer tags Tropicalization of temperate ecosystems in North America: The northward range expansion of tropical organisms in response to warming winter temperatures Abstract (from Global Change Biology): Tropicalization is a term used to describe the transformation of temperate ecosystems by poleward‐moving tropical organisms in response to warming temperatures. In North America, decreases in the frequency and intensity of extreme winter cold events are expected to allow the poleward range expansion of many cold‐sensitive tropical organisms, sometimes at the expense of temperate organisms. Although ecologists have long noted the critical ecological role of winter cold temperature extremes in tropical–temperate transition zones, the ecological effects of extreme cold events have been understudied, and the influence of warming winter temperatures has too often been left out of... Categories: Publication; Types: Citation Establishing a Foundation for Understanding Climate Change Impacts on Coastal Wetland Ecosystems Coastal wetlands are one of the most economically valuable ecosystems in the world. In the United States, the ecosystem services provided by wetlands are worth billions of dollars and include flood protection, erosion control, seafood, water quality enhancement, carbon storage, recreation, and wildlife habitat. Unfortunately, these ecosystems are also highly sensitive to changing climate conditions. Past research on climate impacts to coastal wetlands have concentrated primarily on sea-level rise, largely ignoring the important influence of changing temperature and precipitation patterns. Understanding the impact of temperature and precipitation on coastal wetlands can help natural and cultural resource managers... Categories: Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2013, CASC, Completed, Plants, Plants, All tags... Projects by Region, Sea-Level Rise and Coasts, Sea-Level Rise and Coasts, South Central, South Central CASC, Water, Coasts and Ice, Water, Coasts and Ice, Wetlands, Wetlands, Wildlife and Plants, Wildlife and Plants, Fewer tags The distribution and structure of mangroves (Avicennia germinans and Rhizophora mangle) near a rapidly changing range limit in the northeastern Gulf of Mexico In coastal wetlands, one of the most striking examples of climate change is the poleward range expansion of mangrove forests in response to warming winters. In North America, the Cedar Key region has often been considered the range limit for mangroves along the western coast of Florida (USA). However, within the past several decades, robust stands of Avicennia germinans and Rhizophora mangle have been observed in the Apalachicola Bay region, which is 200 km northwest of Cedar Key. This dataset characterizes the distribution and structure of the mangroves in the Apalachicola Bay area of Florida identified via extensive ground surveys and photointerpretation of aerial imagery from 2018 to 2019. Categories: Data; Tags: Apalachicola Bay, Dog Island, Ecology, Saint George Island, Saint Joseph Bay, All tags... Saint Vincent Island, USGS Science Data Catalog (SDC), ecology, ecosystem monitoring, effects of climate change, Fewer tags Effects of chronic and acute stressors on transplanted black mangrove (Avicennia germinans) seedlings along an eroding Louisiana shoreline Abstract (from Restoration Ecology): Coastal wetland restoration can be used to offset past wetland losses and/or reduce future losses due to land‐use changes, rising sea levels, and accelerating climate change. However, there is a need for information regarding the restoration‐relevant performance of foundation species like mangrove and marsh plants, including their responses to acute and chronic stressors that can affect restoration outcomes. Mangrove encroachment and poleward range expansion into marsh, facilitated by warming winters, has provided restoration practitioners in the northern Gulf of Mexico with a new foundation plant species to consider using during restoration. To evaluate the performance of transplanted... Categories: Publication; Types: Citation Final Report: Communicating Future Sea-Level Rise Scenarios for Gulf Coast National Wildlife Refuge and National Park Lands Low-lying public lands along the northern Gulf of Mexico coast are vulnerable to sea-level rise. Coastal planners and resource managers in the region have requested customized information that can be used to concisely communicate local sea-level rise scenarios and identify potential impacts to the missions of management agencies. In this project, researchers worked with the Northern Gulf of Mexico Sentinel Site Cooperative to develop information sheets outlining potential sea-level rise scenarios for the region through 2100 including their potential impact on the missions of federally-managed lands. Researchers drew from existing information on regional and global sea-level rise scenarios to develop customized... Categories: Publication; Types: Citation; Tags: Alabama, Estuarine Coastal, Estuarine Coastal Intertidal, Florida, Gulf of Mexico, All tags... Louisiana, Mississippi, Sea-Level Rise and Coasts, Southeast CASC, Texas, Water, Coasts and Ice, parks, Fewer tags Final Project Memo- Establishing a Foundation for Evaluating the Ecological Implications of Climate Change along a Gradient in Macroclimatic Drivers of Coastal Wetland Ecosystems The northern Gulf of Mexico coast spans a dramatic water availability gradient (precipitation range: 700 to 1800 mm/year) and represents an excellent natural laboratory for developing climate-influenced ecological models for natural resource managers and culture keepers. In this project, we used this zone of remarkable transition to develop macroclimate-based models for quantifying the regional responses of coastal wetland ecosystems to climate variation. In addition to providing important fish and wildlife habitat and supporting coastal food webs, these coastal wetlands provide many ecosystem goods and services including clean water, stable coastlines, food, recreational opportunities, and stored carbon. Our objective... Tags: Coastal Wetlands, Microclimate, Sea-Level Rise and Coasts, South Central CASC, Water, Coasts and Ice, All tags... Wetlands, climate change, Fewer tags 1 2 »