Marcus Griswold

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Marcus Griswold

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Marcus Griswold
Program Coordinator, Climate Change Adaptation

Department of Natural Resources Office for a Sustainable Future

580 Taylor Avenue
E-2 DNR Tawes Building
Annapolis, MD 21401
USA

Phone: (410) 260-8987
Cell: (410) 330-6987
Email: mgriswold@dnr.state.md.us

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PERSONAL DETAILS

Name	Marcus Griswold
Email	mgriswold@dnr.state.md.us

EDUCATION

2008

PhD
Environmental Engineering Sciences
University of Florida
H.T. Odum Center for Wetlands

2004

M.S. Entomology
University of Florida

2000

B.S. Biology
University of Maryland - College Park
Environmental Scholar Program

QUALIFICATIONS

Marcus Griswold works with communities and agencies to provide outreach, identify needs, and to compile and create strategies for climate change adaptation across multiple sectors across the state of Maryland. Previously he has worked with NGOs, state and federal agencies to analyze opportunities to improve watershed management and resilience in the field of water resources. Locally he was responsible for incorporating measures to quantify and increase aquatic habitat for target species into stream restoration designs. Prior to this, he worked with the commercial forest industry and private landowners in the southeast U.S. and Costa Rica to improve forest management practices along streams. As part of this, he assessed the impacts of watershed management practices and climate variability on aquatic biodiversity, water quality, and water quantity.

Marcus has also taken an active role in on-the-ground restoration efforts and water policy in the state of Maryland. He currently serves on the State Water Quality Advisory Committee, where he has had the opportunity to review and comment on state management plans and the Chesapeake Bay TMDL, including new planning laws and more recently the current permit process for Marcellus Shale projects. As the President of the Board and Chair of the Scientific and Technical Advisory Committee for local watershed groups, Marcus has worked to increase watershed restoration efforts in the region and worked with multiple stakeholders to identify gaps in policy and data that limit the protection of water resources. He has worked with the local government to prioritize riparian plantings, provides technical input on Environmental Impact Statements, and is working to engage local citizens in an effort to improve access to streams and knowledge of their benefits.

PROFESSIONAL EXPERIENCE

June 2011- present

Program Coordinator, Climate Change Adaptation.
University of Maryland Center for Environmental Science/Maryland Department of Natural Resources - Annapolis, MD

Responsible for implementation of state climate change adaptation strategies outside of sea level rise, including but not limited to water resources, human health, ecological communities, agriculture, and land use planning. Develops outreach products and compiles tools for climate change adaptation strategies for each sector. Works with experts to assess data needs for climate change impacts, vulnerability, and adaptation.

July 2010 - June 2011

Anthony Lapham River Conservation Fellow
American Rivers Washington, DC

Responsible for the analysis of federal policies that would improve the management of federal and private forests to acknowledge the importance and protect water resources. Actively engaged non-profit partners, high level agency staff, forest agencies, and decisionmakers to find mechanisms and policy changes that will move this forward, including the use of social media and policy reports. Led the effort to set the advocacy priorities for the upcoming Farm Bill to ensure the maintenance of conservation programs and a focus of the protection of water resources and downstream communities. Led initiative for a watershed pilot project to demonstrate the importance of forests to downstream communities.

August 2008 - June 2010

Environmental Scientist
Coastal Resources, Inc. Annapolis, MD

Co-authored monitoring plan to adress the impacts of a large scale stream restoration project on aquatic biodiversity and channel morphology for the State Highway Administration. Developed habitat metrics for the evaluation of stream restoration work for the improvement of trout habitat. Sampled and identified aquatic macroinvertebrates, fish, and amphibian communities for stream and wetland mitigation projects. Conducted watershed assessments and hydrologic assessment of streams and wetlands in need of restoration. Assisted with stream restoration designs. Analyzed the physical integrity of streams and wetlands that were previously restored.

2008

Evergreen Fellow
Friends of the Osa. 2008. Osa, Costa Rica

Designed and conducted an ecological and geomorphic assessment of riparian zone management on private lands. Worked with private farmers to demonstrate the importance of riparian zones and to communicate the public health issues associated with poor water quality.

2005-2008

U.S. EPA STAR Graduate Fellow and Teaching Assistant
University of Florida. Gainesville, FL

Designed and conducted research studies to evaluate state watershed management standards in headwater streams in Georgia and Florida. Compared best management practices for forestry and storm water management in urban and rural streams. Supervised graduate and undergraduate students in the field and lab, provided advice on project design, hypotheses, data analysis, and interpretation of results. Presented research at local and national conferences to academic researchers, non-profit organizations, and management organizations (e.g., the U.S. Forest Service). Formulated budgets, organized progress reports, and acted as a liaison between the grantor (i.e., National Council for Air and Stream Improvement/National Fish and Wildlife Foundation) and the University of Florida.

SERVICE EXPERIENCE

June 2010 - Present

Board Member and Chair Scientific and Technical Advisory Committee
BlueWater Baltimore

January 2010 - June 2011

Watershed Subcommittee
Maryland State Water Quality Advisory Committee

December 2009 - June 2010

President of the Board
Gwynns Falls Watershed Association

2006 - 2007

Watershed Action Volunteer
St. John's River Watershed Management District

2002 - 2005

Volunteer Wildlife Rehabilitator
Florida Wildlife Care

MEDIA EXPERIENCE

2009

Freelance writer
Examiner, Green Living Blog

Freelance writer and editor
EBSCO, Point of View Database

Freelance writer
Health in a Heartbeat, a public radio series broadcast nationwide

HONORS AND FUNDING

2007

William V. Storch Award($1,000)
Florida Section of the American Water Resources Association

Evergreen Fellowship ($2,982)
Friends of the Osa

2006 - 2008

EPA STAR Fellowship ($74,000)
U.S. Environmental Protection Agency

2006

Invited Workshop; "Snowbird Charrette: Environmental Design" Snowbird, Utah
National Science Foundation/Social Science Research Council

REFERENCES

David Moryc
Senior Director
River Protection Program
American Rivers
320 SW Stark St., Ste. 412
Portland, OR 97204
Phone: (503) 827-8648
Email: dmoryc@americanrivers.org

Thomas L. Crisman, PhD
Dr. Kiran C. Patel Center for Global Solutions
4202 East Fowler Avenue - SOC 102
Tampa, FL 33620
Phone: (813) 974-2954
Email: tcrisman@cas.usf.edu

Zoe Johnson
Office for a Sustainable Future
Maryland Department of Natural Resources
Annapolis, MD 21401
Phone: (410) 260-8741
Email: ZJohnson@dnr.state.md.us

Publications

This page provides a reference list in Word and PDF formats, an RSS feed for new publications, a link to browse/search through all Marcus's publications in the literature database. You can also view the abstract and keywords and access a pemanent link to the article in our literature database by expanding the citation, or view the full details of each publication in the database, or view the article on the publisher's website, which may include access to fulltext and PDF versions.

Reports
2006
Griswold MW, Winn RT, Crisman TL, White WR (2006) Dry creek long-term watershed study: assessment of immediate response of aquatic macroinvertebrates to watershed level harvesting and thinning of streamside management zones. U.S. Department of Agriculture, Forest Service, Southern Research Station, Asheville, NC, 392–395 Permanent link \| Save citation: RTF PDF LaTeX
Peer-reviewed Publications
2008
Griswold MW, Berzinis RW, Crisman TL, Golladay SW (2008) Impacts of climatic stability on the structural and functional aspects of macroinvertebrate communities after severe drought. Freshwater Biology 53(12):2465–2483 Abstract: 1. Unpredictable, extreme climatic events (e.g. droughts) can potentially destabilize aquatic communities. From 1998 to 2002, southwestern Georgia, U.S.A., experienced the third worst drought of the last 100 years, leading to loss of surface flow in many small streams. We sampled macroinvertebrates, flow and water chemistry in small headwater streams from 2001 to 2007 in two adjacent coastal plain streams of contrasting headwater type (wetland and groundwater-fed seep) following resumption of flow. 2. Decreasing water temperature, conductivity and nutrient concentrations within the first 2 years of the study indicated flushing of the streambed associated with increased discharge. Invertebrate community composition became less variable over time and during wetter years, reflecting water chemistry, hydrological and climate conditions. 3. A core set of species appeared immediately following breaking of the drought in both streams, reflecting a shared species pool. These species exhibited resilience traits, including short life cycles and resistance to desiccation, which allowed for rapid recovery from disturbance. Such species, which were small-bodied, sclerotized and abundant in the drift, were then replaced as flows increased by those that were larger, soft-bodied and rare in drift, suggesting a more stable and less ephemeral habitat. 4. Hydrologic regime and long-term precipitation indices were strongly correlated with invertebrate community and trait structure. Long-term data allowed for better interpretation of the effects of infrequent disturbances on aquatic ecosystems. Additionally, long-term precipitation indices (i.e. 48-month standardized precipitation index) can indicate the likelihood of a return to drought, allowing for the collection of pre-disturbance data. Permanent link \| Save citation: RTF PDF LaTeX
2006
Griswold MW, Lounibos LP (2006) Predator identity and additive effects in a treehole community. Ecology 87(4):987–995 Abstract: Multiple predator species can interact as well as strongly affect lower trophic levels, resulting in complex, nonadditive effects on prey populations and community structure. Studies of aquatic systems have shown that interactive effects of predators on prey are not necessarily predictable from the direct effects of each species alone. To test for complex interactions, the individual and combined effects of a top and intermediate predator on larvae of native and invasive mosquito prey were examined in artificial analogues of water-filled treeholes. The combined effects of the two predators were accurately predicted from single predator treatments by a multiplicative risk model, indicating additivity. Overall survivorship of both prey species decreased greatly in the presence of the top predator Toxorhynchites rutilus. By itself, the intermediate predator Corethrella appendiculata increased survivorship of the native prey species Ochlerotatus triseriatus and decreased survivorship of the invasive prey species Aedes albopictus relative to treatments without predators. Intraguild predation did not occur until alternative prey numbers had been reduced by approximately one-half. Owing to changes in size structure accompanying its growth, T. rutilus consumed more prey as time progressed, whereas C. appendiculata consumed less. The intermediate predator, C. appendiculata, changed species composition by preferentially consuming A. albopictus, while the top predator, T. rutilus, reduced prey density, regardless of species. Although species interactions were in most cases predicted from pairwise interactions, risk reduction from predator interference occurred when C. appendiculata densities were increased and when the predators were similarly sized. Permanent link \| Save citation: RTF PDF LaTeX
2005
Alto BW, Griswold MW, Lounibos LP (2005) Habitat complexity and sex-dependent predation of mosquito larvae in containers. Oecologia 146(2):300–310 Abstract: Studies in aquatic systems have shown that habitat complexity may provide refuge or reduce the number of encounters prey have with actively searching predators. For ambush predators, habitat complexity may enhance or have no effect on predation rates because it conceals predators, reduces prey detection by predators, or visually impairs both predators and prey. We investigated the effects of habitat complexity and predation by the ambush predators Toxorhynchites rutilus and Corethrella appendiculata on their mosquito prey Aedes albopictus and Ochlerotatus triseriatus in container analogs of treeholes. As in other ambush predator-prey systems, habitat complexity did not alter the effects of T. rutilus or C. appendiculata whose presence decreased prey survivorship, shortened development time, and increased adult size compared to treatments where predators were absent. Faster growth and larger size were due to predator-mediated release from competition among surviving prey. Male and female prey survivorship were similar in the absence of predators, however when predators were present, survivorship of both prey species was skewed in favor of males. We conclude that habitat complexity is relatively unimportant in shaping predator-prey interactions in this treehole community, where predation risk differs between prey sexes. Permanent link \| Save citation: RTF PDF LaTeX
Griswold MW, Lounibos LP (2005) Competitive outcomes of aquatic container diptera depend on predation and resource levels. Annals Of The Entomological Society Of America 98(5):673–681 Abstract: Resources and predation are both known to be important in structuring communities; however the strength of one factor may be affected by the intensity of the other. This study used a fully crossed factorial experiment in laboratory microcosms to examine the ability of a predator, Corethrella appendiculata (Grabham), and basal resources (leaf litter) to differentially affect two competing species of mosquito prey. Increased resources resulted in shorter developmental time and increased survivorship, mass, and population performance for both prey species, except when predation levels were high. Increased levels of predation and resources reduced the negative competitive effects of Aedes albopictus (Skuse) on Ochlerotatus triseriatus (Say). At low levels of resources and predation, the superior competitor, A. albopictus had the higher survivorship, and at high levels of resources and predation, the inferior competitor's survival was greater. Predators in high-resource treatments emerged larger than those in low resources, suggesting the occurrence of a bottom-up cascade or alternative feeding method. This study suggests that survival and coexistence of the two prey species may depend on the interaction of resources and predation, in that high levels of predation are important for the coexistence of both species. Permanent link \| Save citation: RTF PDF LaTeX
Griswold MW, Lounibos LP (2005) Does differential predation permit invasive and native mosquito larvae to coexist in Florida? Ecological Entomology 30(1):122–127 Abstract: 1. The hypothesis that selective predation on larvae of the invasive Aedes albopictus (Skuse) could account for its stable coexistence with the native mosquito species and inferior competitor Ochlerotatus triseriatus (Say) in Florida treeholes and container systems was tested experimentally. 2. Functional responses of the two dipteran predators Toxorhynchites rutilus (Coquillett) and Corethrella appendiculata (Grabham) were evaluated separately for A. albopictus and O. triseriatus prey. Both predators exhibited type II functional responses and consistently consumed more of the invasive species. Handling time of T. rutilus feeding upon O. triseriatus was significantly longer than when preying upon the invasive species. 3. When either predator species was offered varying ratios of the two prey species, A. albopictus was consumed preferentially. The absence of a prey ratio effect on preference indicated that switching probably does not occur. 4. The higher maximum feeding rate upon, and preference for, A. albopictus suggests that differential predation may foster coexistence of the invasive and native mosquito prey species in Florida. Permanent link \| Save citation: RTF PDF LaTeX
Conference Proceedings
2006
Miwa M, Summer WB, Terrell SB, Griswold MW, Jones DG, Winn RT, Bell M (2006) Timber harvesting effects on small headwater riparian wetlands in southwestern Georgia. In: Amatya DM, Nettles J (eds) Hydrology and Management of Forested Wetlands Proceedings of the International Conference. ASABE, New Bern, NC Permanent link \| Save citation: RTF PDF LaTeX

Science Communication Publications Browse all publications for Marcus Griswold on IAN Press OR view individually:
2013
Griswold M, Wicks EC and Johnson Z (2013) Climate Change Impact Areas: Planning for a changing climate. Maryland Department of Natural Resources and the Integration and Application Network, 4pp (Newsletter)
Griswold M, Johnson Z and Wicks EC (2013) Land Management: Farming in a changing climate. Maryland Department of Natural Resources and the Integration and Application Network, 4pp (Newsletter)