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Studies & Reports

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Released: Title: Description:
6/22/2017 Barnegat Bay Watershed Stream Connectivity Survey 2016  The BBP conducted a series of assessments on road and stream crossings in priority sub-watersheds of the Barnegat Bay during 2016 with funding from the Wildlife Management Institute. These surveys followed the NAACC (North Atlantic Aquatic Connectivity Collaborative) protocols for assessing impediments to stream flow and fish passage, and are part of a larger BBP project to identify crossings of concern throughout the watershed.
6/8/2017 M. Tedesco presentation to the BBP-AC regarding EBM in Long Island Sound  This is a .pdf of the powerpoint presentation given by Mark Tedesco, Director of the Long Island Sound Office to the BBP Advisory Committee on March 21, 2017 regarding the incorporation of Ecosystem Based Management (EBM) into their recent CCMP revision.
6/8/2017 D. Carpenter Presentation to the BBP-AC on EBM in APNEP  This is a .pdf of the powerpoint presentation given by Dean Carpenter of the Albemarle-Pamlico National Estuary Partnership (APNEP) to the BBP Advisory Committee January 26, 2017 regarding the incorporation of Ecosystem Based Management (EBM) into their recent CCMP revision.
4/25/2017 2017 Barnegat Bay Prospectus: Monitoring, Assessment, and research priorities for the BB-LEH ecosystem to support science-based watershed management  This document is the second research prospectus developed by the BBP's Science and Technical Advisory Committee. Consistent with the priority areas identified in the 2012-2016 Strategic Plan, and building on the knowledge gained through the last several years of research, the five main categories of studies detailed in this prospectus are considered critical to advancing our understanding of the bay and monitoring the effectiveness of restoration activities. Addressing the research priorities and remaining data gaps identified in this second prospectus will help ensure our collective commitment to science-based decision-making and guide future actions to protect and restore the bay and its contributing watershed.
6/1/2016 Assessing the Status of Barnegat Bay Submerged Aquatic Vegetation - 2015  Barnegat Bay has been experiencing a decline of Zostera marina, the important ecosystem engineer which provides a diverse suite of services which increase the diversity and productivity of coastal ecosystems. As efforts are made to reduce those stressors negatively impacting submerged aquatic vegetation health, primarily euthrophication, monitoring is necessary to assess the efficacy of these measures and the role of water quality on overall habitat resiliency. The objective of this project was to provide ongoing quantitative measures on the health of the primary indicators, submerged aquatic vegetation, at a subset of sites throughout northern, central and southern Barnegat Bay. The northern region was dominated by Ruppia maritima and the southern region by Zostera marina, with a transitional zone in the central region. Aboveground biomass of Zostera marina indicates there may be a recovering population within the Bay; however, this may be attributed to annual and seasonal variations rather than an upward trend. Continued monitoring is necessary to elucidate any trends. In those central regions with increasing cover by Ruppia maritima, future work is necessary to determine if Ruppia maritima can provide equivalent habitat and ecosystem services as Zostera marina. The majority of macroalgae sampled was in the form of clumped drift algae, which has a temporary impact on Zostera marina and Ruppia maritima health when compared to longer residence blooms. Linkages between these basal primary producers and upper trophic levels is well documented and the future state of Barnegat Bay fauna, including recreationally and commercially important fish and invertebrate species, will be determined by the resilience of this vegetation in the face of changing water quality parameters.
4/10/2014 Water level response in back-barrier bays unchanged following Hurricane Sandy  On 28-30 October 2012, Hurricane Sandy caused severe flooding along portions of the northeast coast of the United States and cut new inlets across barrier islands in New Jersey and New York. About 30% of the 20 highest daily maximum water levels observed between 2007 and 2013 in Barnegat and Great South Bay occurred in 5 months following Hurricane Sandy. Hurricane Sandy provided a rare opportunity to determine whether extreme events alter systems protected by barrier islands, leaving the mainland more vulnerable to flooding. Comparisons between water levels before and after Hurricane Sandy at bay stations and an offshore station show no significant differences in the transfer of sea level fluctuations from offshore to either bay following Sandy. The post-Hurricane Sandy bay high water levels reflected offshore sea levels caused by winter storms, not by barrier island breaching or geomorphic changes within the bays.
9/16/2011 Application and assessment of a nutrient pollution indicator using eelgrass (Zostera marina L.) in Barnegat BayLittle Egg Harbor estuary, New Jersey  Eutrophication degrades numerous estuaries worldwide and a myriad of assessment metrics have been developed. Here, we apply an example of a previously developed metric (Lee et al., 2004) designed to indicate incipient estuarine eutrophication to validate this technique in an already eutrophic estuary end-member, Barnegat BayLittle Egg Harbor, New Jersey. The metric, termed Nutrient Pollution Indicator (NPI) uses eelgrass (Zostera marina L.) as a bioindicator and is calculated as the ratio of leaf nitrogen content (%N) to area normalized leaf mass (mg dry wt cm−2). Seagrass samples were collected along the entire length of the Barnegat BayLittle Egg Harbor from June to October 2008 to determine if leaf chemistry and morphology reflect eutrophication status and a northsouth gradient of nitrogen loading from the Barnegat Bay watershed. Nitrogen content, area normalized leaf mass, and NPI values all significantly (p < 0.05) varied temporally but not spatially. NPI values did not significantly correspond to the northsouth gradient of nitrogen loading from the Barnegat Bay watershed. The NPI metric is therefore not deemed to reliably indicate estuarine eutrophic status. Differences between sampling effort (number of stations) and replication did not bias the overall conclusions.
5/11/2014 Comparison of remotely-sensed surveys vs. in situ plot-based assessments of seagrass condition in Barnegat Bay-Little Egg Harbor, New Jersey USA  This paper examines the utility of remotely sensed vs. in situ plot-based monitoring in the Barnegat Bay-Little Egg Harbor (BBLEH), New Jersey, USA estuarine system. We compared the remotely-sensed mapping of seagrass cover change (in 2003 vs. 2009) vs. in situ plot-based monitoring conducted from 2004 through 2009. Comparison of the remotely-sensed vs. the in situ plot-change analysis suggests that the two methodologies had broadly similarly results, with the percent area showing declines in sea grass cover greater than those that exhibited increases. In conclusion, the two studies provide corroborating evidence that sea grass has declined in percent cover in the BB-LEH system during the decade of the 2000s.
1/27/2016 Fuzzy cognitive mapping in support of integrated ecosystem assessments: Developing a shared conceptual model among stakeholders  Using Fuzzy Cognitive Mapping the authors constructed a series of ecosystems models of the Barnegat Bay based on stakeholder perceptions of ecosystem function and linkages. They then compared the models of different stakeholders to look for commonalities and differences that could be used to advance Ecosystem Based Management of the bay.
1/13/2016 Modeling Zostera marina restoration potential in Barnegat Bay  The goal of this study, conducted by Stockton University, was to refine and apply the model developed by Jarvis et al. (2014) to quantify SAV resiliency to perturbations through modelling loss and recovery processes within established SAV beds in BB-LEH.
12/16/2015 Factors Governing the Vulnerability of Coastal Marsh Platforms to Sea Level Rise  Synopsis of the scientific knowledge on the factors that contribute to vertical losses in brackish and saline marshes of the Mid-Atlantic. Vertical losses, or those driven by platform elevation declines, can be largely attributed to functional impairment. Horizontal loss, also a large contributor to wetland acreage decline, is governed by factors such as edge erosion. This orientation seeks to aid coastal managers and practitioners in understanding the complex array of factors that affect platform (vertical) vulnerabilities of the coastal wetlands in our region.
10/21/2015 Barriers, Limits and Limitations to Resilience  Enhancing resilience has become a key element of preparedness for extreme events and climate change. While much progress has been made in defining components of resilience, many questions remain about identification of appropriate strategies for building resilience, barriers to implementation of these strategies, and limits to the potential effectiveness of these efforts. New questions are also emerging about inherent limitations of resilience based approaches, suggesting that resiliency efforts must be coupled with broader transformations of the social and political conditions that create and perpetuate vulnerabilities. Investigation of resilience options and barriers has particular resonance for urbanized coastal communities, many of which face significant climate hazards and development related pressures and are also encountering a suite of technical, political, financial, legal, and policy hurdles to adaptation. This study explored these issues in coastal New Jersey, USA. The methodology entailed a co-production approach, whereby stakeholders and researchers collaborated in the development of climate risk and vulnerability information and identification of resilience options and barriers. The collaboration provided important insights into barriers, limits and limitations of on-going resilience-building efforts but also revealed potential openings for transformation.
4/13/2015 Role of Plant and Soil Community Structure in Riparian Soil Nutrient Retention  The goal of this research was to assess the feedbacks among non-‐point source pollution, plant communities, and soil community structure along a riparian corridor of the Barnegat Bay Watershed (BBW). We examined soil and plant community composition in the summer of 2013 along the Toms River, looking at the the effects of urbanization on flora, bacterial and fungal communities along a riparian corridor in both floodplain and upland zones. Ultimately, understanding the interactions between the plant and soil communities has allowed us here to make recommendations of restoration targets in the BBW.
1/5/2015 Soil Health Improvement Project  This report summarizes the activities of the Ocean County Soil Conservation District's Soil Health Improvement Project (SHiP) conducted at Jake's Branch County Park. The project consisted of 1)the identification of optimal physical, chemical, and biological properties of Ocean County's sandy soils to improve infiltration and reduce runoff and nutrient loss, and 2) the development of simple, low coast and practical soil restoration techniques that are transferable to homeowners. This was accomplished through a blend of research and outreach and education.
12/18/2014 Assessment of nutrient loading and eutrophication in Barnegat Bay - Little Egg Harbor, NJ in support of nutrient management planning  This investigation is part of a multi-year, interdisciplinary effort by Rutgers University and the USGS that characterizes and quantifies the estuary with regard to watershed nutrient inputs, physical and water quality properties, and biological indicators and responses. Extensive databases collected over the 1989-2011 timeframe have been examined in this study. Component 1 of the study involves watershed nutrient loading quantification from existing (secondary) data. In Component 2, estuarine biotic responses to stressors and the current degree of eutrophication are quantified from new and secondary data. In Component 3, biotic indices are developed, and values of the indices are computed. The current extent and validation of eutrophication are determined in Component 4. Synthesis and management recommendations are developed in Component 5.
12/18/2014 Silver Bay Watershed Microbial Source Tracking  This report, prepared by Birdsall Engineering and Monmouth University, identifies potential sources of pathogenic bacteria with the Silver Bay watershed and presents recommendation for reducing bacterial levels and improving overall water quality.
11/21/2014 BENEFICIAL USE OF DREDGED MATERIAL TO RESTORE WETLANDS FOR COASTAL FLOOD MITIGATION BARNEGAT BAY , NEW JERSEY  The Richard Stockton College Coastal Research Center(CRC)and the Monmouth University Urban Coast Institute(UCI)have completed a reconnaissancelevel project to determine if there is a relationship between selected areas of intertidal wetland (i.e. Spartina alterniflora salt marsh) edge erosion along the mainland shoreline of Barnegat Bay and nearby state channels as well as other waterways in need of dredging which were shoaled as a result of Hurricane Sandy. The goal of the project is to identify eroded edges of intertidal wetlands that can be restored to pre-existing conditions can be defined as using sediment dredged from the shoaled state navigation channels in an effort to reduce future flood risk to adjacent coastal development.
9/24/2014 Quantifying the Residence Time and Flushing Characteristics of a Shallow, Back-Barrier Estuary: Application of Hydrodynamic and Particle Tracking Models  Estuarine residence time is a major driver of eutrophication and water quality. Barnegat Bay-Little Egg Harbor (BB-LEH), New Jersey, is a lagoonal back-barrier estuary that is subject to anthropogenic pressures including nutrient loading, eutrophication, and subsequent declines in water quality. A combination of hydrodynamic and particle tracking modeling was used to identify the mechanisms controlling flushing, residence time, and spatial variability of particle retention. The models demonstrated a pronounced northward subtidal flow from Little Egg Inlet in the south to Pt. Pleasant Canal in the north due to frictional effects in the inlets, leading to better flushing of the southern half of the estuary and particle retention in the northern estuary. Mean residence time for BB-LEH was 13 days but spatial variability was between ∼0 and 30 days depending on the initial particle location. Mean residence time with tidal forcing alone was 24 days (spatial variability between ∼0 and 50 days); the tides were relatively inefficient in flushing the northern end of the Bay. Scenarios with successive exclusion of physical processes from the models revealed that meteorological and remote offshore forcing were stronger drivers of exchange than riverine inflow. Investigations of water quality and eutrophication should take into account spatial variability in hydrodynamics and residence time in order to better quantify the roles of nutrient loading, production, and flushing.
7/16/2014 Resilience. Preparing New Jersey for Climate Change: Policy Considerations from the New Jersey Climate Adaptation Alliance  Resilience: Preparing New Jersey for Climate Change: Policy Considerations from the New Jersey Climate Adaptation Alliance is the culmination of a deliberative research and stakeholder engagement process undertaken by the New Jersey Climate Adaptation Alliance (the Alliance), a network of policymakers, public and private sector practitioners, academics, nongovernmental organizations, and business leaders designed to build climate change preparedness capacity in New Jersey. The mission of the Alliance is to identify, demonstrate, recommend and communicate policies and activities that can prepare New Jerseys vulnerable sectors to better meet the anticipated impacts of climate change. The individuals and organizations that comprise the Alliance Advisory Committee agree that the recommendations in this report present the compelling issues to be addressed as part of a statewide climate change adaptation discussion.
7/16/2014 Concentrations, loads, and yields of total nitrogen and total phosphorus in the Barnegat Bay-Little Egg Harbor watershed, New Jersey, 19892011, at multiple spatial scales  Concentrations, loads, and yields of nutrients (total nitrogen and total phosphorus) were calculated by the USGS for the Barnegat Bay-Little Egg Harbor (BB-LEH) watershed for 19892011 at annual and seasonal (growing and nongrowing) time scales. Concentrations, loads, and yields were calculated at three spatial scales: for each of the 81 subbasins specified by 14-digit hydrologic unit codes (HUC-14s); for each of the three BB-LEH watershed segments, which coincide with segmentation of the BB-LEH estuary; and for the entire BB-LEH watershed. Base-flow and runoff values were calculated separately and were combined to provide total values.
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