Beth A. Middleton John L. David 20221116 tabular digital data Reston, VA U.S. Geological Survey https://doi.org/10.5066/P997WSVS This dataset documents the water quality in depth, salinity, and pH as well as the vegetation found in the freshwater swamps of Hickory Point State Forest near Pocomoke City, Maryland from 2013 to 2021. This data was collected as part of a study on trends in vegetation in a tidal freshwater swamp experiencing saltwater intrusion. The data on water depth, salinity, and pH was used to determine water quality in the study. The vegetation data was collected to determine shifts in dominant vegetation types in correlation with the water data. Beth A. Middleton ORCID 0000-0002-1220-2326 John L. David ORCID 0000-0002-9254-5299 20130905 20211111 ground condition Complete None planned Hickory Point State Forest -75.6952 -75.5949 38.0833 37.9832 ISO 19115 Topic Category biota None freshwater swamp regime shift relict forest USGS Thesaurus climate change droughts freshwater ecosystems Coastal and Marine Ecological Classification Standard Forested Wetland Relict Tidal Inlet Alexandria Digital Library Feature Type Thesaurus wetlands Marine Realms Information Bank (MRIB) keywords global warming USGS Metadata Identifier USGS:6340234bd34e342aee0735d7 None Hickory Point State Forest Pocomoke River Chesapeake Bay Common geographic areas United States Maryland Pocomoke City None Boehmeria cylindrica Calamagrostis canadensis Leersia oryzoides Liquidambar styraciflua Hydrocotyle verticillata Onoclea sensibilis Osmunda cinnamomea Pluchea foetida Polygonum sagittatum Sagittaria latifolia Sium suave Thelypteris palustris Typha X glauca Kingdom Plantae Subkingdom Viridiplantae Infrakingdom Streptophyta Superdivision Embryophyta Division Tracheophyta Subdivision Spermatophytina Class Magnoliopsida Superorder Rosanae Order Rosales Family Urticaceae Genus Boehmeria Species Boehmeria cylindrica TSN: 19121 Superorder Lilianae Order Poales Family Poaceae Genus Calamagrostis Species Calamagrostis canadensis TSN: 40544 Genus Leersia Species Leersia oryzoides TSN: 40886 Family Typhaceae Genus Typha Species Typha X glauca TSN: 42328 Order Alismatales Family Alismataceae Genus Sagittaria Species Sagittaria latifolia TSN: 38908 Superorder Saxifraganae Order Saxifragales Family Altingiaceae Genus Liquidambar Species Liquidambar styraciflua TSN: 19027 Superorder Asteranae Order Apiales Family Araliaceae Genus Hydrocotyle Species Hydrocotyle verticillata TSN: 29515 Family Apiaceae Genus Sium Species Sium suave TSN: 29558 Order Asterales Family Asteraceae Genus Pluchea Species Pluchea foetida TSN: 36062 Superorder Caryophyllanae Order Caryophyllales Family Polygonaceae Genus Persicaria Species Persicaria sagittata Subdivision Polypodiophytina Class Polypodiopsida Subclass Polypodiidae Order Polypodiales Family Onocleaceae Genus Onoclea Species Onoclea sensibilis TSN: 17637 Family Thelypteridaceae Genus Thelypteris Species Thelypteris palustris TSN: 17251 Order Osmundales Family Osmundaceae Genus Osmundastrum Species Osmundastrum cinnamomeum None. Please see 'Distribution Info' for details. Acknowledgement of the authors as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices for data source is expected by users of these data. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Beth A Middleton U.S. Geological Survey, Southeast Region Research Ecologist mailing address

700 Cajundome Blvd

Lafayette LA 70506 US 337-266-8618 337-266-8592 middletonb@usgs.gov No formal attribute accuracy tests were conducted. Data were checked, and all values fall within expected ranges. Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. During the growing seasons of 2013 through 2021, herbaceous species and woody seedlings were assessed in a one-m2 quadrat at five plot locations along a 125 m transect running through Hickory Point State Forest. At each plot marker, day-of-site visit measurements of water quality and depth (with a meter stick) were sampled. Pore water was sampled from approximately 15 cm under the surface of the ground. Salinity and pH were measured with a temperature-compensated meter after the collected water was transported to the lab. 20130905 HickoryPointVeg2013-2021.csv Comma Separated Value (CSV) file containing data. Producer Defined Site The unique name indicator for the location where the data was collected. Producer Defined The site names have the year for the plant collection by plot. There are five plots represented by Plot1-5. This is followed by the year, 2013-2021. Year The year the data was collected. Producer Defined 2013 2021 Waterdepth The water depth at the time the data was collected. Producer Defined 0.1 10.0 cm LSalinity Log salinity. Producer Defined 0.063333359 0.514547753 pH The pH of the water sample collected at each plot. Producer Defined 4.99 7.73 Boehmeria The decimal percent cover of Boehmeria cylindrica for each year in each plot. Producer Defined 0.0 0.463647609 Polygonum The decimal percent cover of Polygonum sagittatum for each year in each plot. Producer Defined 0.0 0.659058036 Calamagrostis The decimal percent cover of Calamagrostis canadensis for each year in each plot. Producer Defined 0.0 0.321750554 Thelypteris The decimal percent cover of Thelypteris palustris for each year in each plot. Producer Defined 0.0 0.463647609 Hydrocotyle The decimal percent cover of Hydrocotyle verticillata for each year in each plot. Producer Defined 0.0 0.659058036 Leersia The decimal percent cover of Leersia oryzoides for each year in each plot. Producer Defined 0.0 0.158780215 Liquidambar The decimal percent cover of Liquidambar styraciflua for each year in each plot. Producer Defined 0.0 0.321750554 Onoclea The decimal percent cover of Onoclea sensibilis for each year in each plot. Producer Defined 0.0 0.158780215 Osmunda The decimal percent cover of Osmunda cinnamomea for each year in each plot. Producer Defined 0.0 0.463647609 Pluchea The decimal percent cover of Pluchea foetida for each year in each plot. Producer Defined 0.0 0.463647609 Sagittaria The decimal percent cover of Sagittaria latifolia for each year in each plot. Producer Defined 0.0 0.659058036 Sium The decimal percent cover of Sium suave for each year in each plot. Producer Defined 0.0 0.463647609 Typha The decimal percent cover of Typha x glauca for each year in each plot. Producer Defined 0.0 0.463647609 Minor The decimal percent cover of minor species for each year in each plot. Producer Defined 0.0 0.463647609 U.S. Geological Survey - ScienceBase mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 USA 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Digital Data https://doi.org/10.5066/P997WSVS None 20221116 Katelyn E Chambliss U.S. Geological Survey, SOUTHEAST REGION Biologist mailing address

700 Cajundome Blvd

Lafayette LA 70506 US 618-303-5013 kchambliss@usgs.gov FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata FGDC-STD-001.1-1999