{"pageNumber":"1868","pageRowStart":"46675","pageSize":"25","recordCount":46677,"records":[{"id":70204765,"text":"70204765 - null - Vegetation pattern on channel features in the Passage Creek Gorge, Virginia","interactions":[],"lastModifiedDate":"2019-08-14T10:53:25","indexId":"70204765","displayToPublicDate":"1983-08-14T10:46:13","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1195,"text":"Castanea","active":true,"publicationSubtype":{"id":10}},"title":"Vegetation pattern on channel features in the Passage Creek Gorge, Virginia","docAbstract":"<div class=\"item-view-info enhanced-layout-view-info\" data-qa=\"item-view-info\"><div class=\"tabs-content\" data-tabs-content=\"content-tabs\"><div id=\"metadata_info_tab_contents\" class=\"tabs-panel is-active pan\" aria-labelledby=\"metadata_info_tab_contents-label\"><div><div><div><div><div class=\"mtl mbxl\" data-ajax=\"false\"><div class=\"break-with-hyphens\"><p>Persistent distribution patterns of woody vegetation within the bottomland forest of Passage Creek, Virginia, were related to fluvial landforms, channel geometry, streamflow characteristics, and sediment-size characteristics. Vegetation patterns were determined from species presence as observed in transects and traverses on landforms developed along the stream. Distinct species distributional patterns were found on four common fluvial geomorphic landforms: depositional bar, active-channel shelf, floodplain, and terrace. Independent hydrologic characteristics (flow duration and flood frequency) were determined for each of the landforms. Vegetation data were analyzed by binary discriminant analysis, principal components analysis, and detrended correspondence analysis. Results and related field observations suggest that certain species are significantly associated with specific fluvial landforms. Vegetation patterns appear to develop more as a result of hydrologic processes associated with each fluvial landform rather than from sediment-size characteristics. Flood disturbance may be an important factor in maintaining the vegetation patterns, which may therefore be used as indicators for particular hydrogeomorphic site conditions.</p></div></div></div></div></div></div></div></div></div>","language":"English","publisher":"Wiley","doi":"10.2307/1940528","usgsCitation":"Hupp, C.R., Vegetation pattern on channel features in the Passage Creek Gorge, Virginia: Castanea, v. 48, no. 2, p. 62-72, https://doi.org/10.2307/1940528.","productDescription":"11 p.","startPage":"62","endPage":"72","numberOfPages":"11","costCenters":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"links":[{"id":366548,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Virginia","otherGeospatial":"Passage Creek","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -78.25286865234375,\n              38.958340924837714\n            ],\n            [\n              -78.35861206054687,\n              38.99570671505043\n            ],\n            [\n              -78.65249633789062,\n              38.753012320665185\n            ],\n            [\n              -78.84063720703123,\n              38.39118617958438\n            ],\n            [\n              -78.75,\n              38.35350340353833\n            ],\n            [\n              -78.46023559570312,\n              38.687653678261704\n            ],\n            [\n              -78.25286865234375,\n              38.958340924837714\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"48","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Hupp, Cliff R. 0000-0003-1853-9197 crhupp@usgs.gov","orcid":"https://orcid.org/0000-0003-1853-9197","contributorId":2344,"corporation":false,"usgs":true,"family":"Hupp","given":"Cliff","email":"crhupp@usgs.gov","middleInitial":"R.","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":true,"id":768382,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70182009,"text":"70182009 - No Year - Sand and gravel resources of Puerto Rico","interactions":[],"lastModifiedDate":"2023-08-21T14:56:42.459518","indexId":"70182009","displayToPublicDate":"2003-12-31T00:00:00","noYear":true,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":6,"text":"USGS Unnumbered Series"},"title":"Sand and gravel resources of Puerto Rico","docAbstract":"<p><span>Many of Puerto Rico's beaches are eroding, and though rates of erosion vary, it is a major concern for the tourism and residential development industries. More than 85 percent of the population lives within 7 kilometers of the coast and they are heavily dependent on tourists that are attracted by the island's beaches and coral reefs. High-quality scientific data are needed to help formulate public policy regarding residential and commercial construction along the coast, beach replenishment, and future use of marine resources. Scientists have long recognized that the causes of coastal land loss are not limited to a relative rise in sea level, but can be manmade as well. For example, sediment supply to beaches especially along the north shore of Puerto Rico has been strongly affected by upstream river channeling, dam construction, various agricultural practices, paving and urbanization, as well as shallow-water oceanographic processes. The response to coastal erosion in Puerto Rico has been mostly crisis based leading to engineered solutions that have a negative effect on the coastal environment.</span></p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/70182009","usgsCitation":"Rodriguez, R.W., Sand and gravel resources of Puerto Rico, HTML Document, https://doi.org/10.3133/70182009.","productDescription":"HTML Document","onlineOnly":"Y","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":335455,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/fs/sand-gravel/","text":"Report","linkFileType":{"id":5,"text":"html"},"description":"Report"},{"id":335463,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg"}],"country":"United States","otherGeospatial":"Puerto 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