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FLOATING ISLANDS--BIOGEOMORPHIC FEATURES OF HILLSBORO MARSH, NORTHEASTERNEVERGLADES, FLORIDA
Title
FLOATING ISLANDS--BIOGEOMORPHIC FEATURES OF HILLSBORO MARSH, NORTHEASTERNEVERGLADES, FLORIDA.
Creator
STONE, PETER ALAN., Florida Atlantic University, Craig, Alan K., Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description
Floating islands are common natural features in modern Hillsboro Marsh. Most floating islands: 1) occur as detached, free-floating batteries (raft-like peaty masses that rise from substrate), and 2) form in habitats containing abundant waterlilies. New batteries are quickly colonized by marsh, and often terrestrial, plants. Differences in species diversity and early succession occur between two ecologically different subareas. In one subarea many batteries succeed quickly to mixed graminoid...
Show moreFloating islands are common natural features in modern Hillsboro Marsh. Most floating islands: 1) occur as detached, free-floating batteries (raft-like peaty masses that rise from substrate), and 2) form in habitats containing abundant waterlilies. New batteries are quickly colonized by marsh, and often terrestrial, plants. Differences in species diversity and early succession occur between two ecologically different subareas. In one subarea many batteries succeed quickly to mixed graminoid-arborescent vegetation. Floating batteries form hydrologically unusual Everglades habitats and support some locally rare plants. Battery formation produces local topographic elevations and depressions. Apparent size-successional vegetational and landform continuumns seem to link batteries with small extant tree-islands. Radiometric evidence suggests presence of batteries in peat profiles of two tree-islands. Everglades floating islands most resemble others reported in southeastern United States and appear dissimilar morphologically and in mode of origin to those reported from elsewhere worldwide.
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Date Issued
1978
PURL
http://purl.flvc.org/fcla/dt/13940
Subject Headings
Islands--Florida--Everglades, Botany--Florida--Ecology, Everglades (Fla)
Format
Document (PDF)
Remote sensing systems for monitoring and quantifying tropical deforestation in the Huallaga River Valley of Peru
Title
Remote sensing systems for monitoring and quantifying tropical deforestation in the Huallaga River Valley of Peru.
Creator
Echavarria, Fernando R., Florida Atlantic University, Craig, Alan K., Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description
This thesis examines the quantification of tropical deforestation, the use of remote sensing techniques for its scientific measurement, and the many controversies surrounding the problem. Aerial photographs and Landsat-based planimetric maps were used to determine the conversion of montane rain forest in a 1,000 km$\sp2$ sector of Peru's Huallaga River Valley. Between 1963 and 1976, 244 km$\sp2$ of forest (approximately a quarter of the study area) were converted to agricultural and other...
Show moreThis thesis examines the quantification of tropical deforestation, the use of remote sensing techniques for its scientific measurement, and the many controversies surrounding the problem. Aerial photographs and Landsat-based planimetric maps were used to determine the conversion of montane rain forest in a 1,000 km$\sp2$ sector of Peru's Huallaga River Valley. Between 1963 and 1976, 244 km$\sp2$ of forest (approximately a quarter of the study area) were converted to agricultural and other land uses, an apparent deforestation rate of 19 km$\sp2$/yr or approximately 1,872 ha/yr. The method entailed the cutting and weighing of strips of Mylar overlays. Despite the photogrammetric limitations, the results demonstrate an economical and practical technique that is readily applicable to developing countries. The potential of other remote sensing systems and the application of change detection techniques such as digital image subtraction to monitor deforestation is detailed.
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Date Issued
1989
PURL
http://purl.flvc.org/fcla/dt/14538
Subject Headings
Geography, Physical Geography, Environmental Sciences, Remote Sensing
Format
Document (PDF)
PALEOGEOGRAPHY OF THE WEST EVERGLADES HIGH
Title
A PALEOGEOGRAPHY OF THE WEST EVERGLADES HIGH.
Creator
MANNE, BARRY LEE., Florida Atlantic University, Craig, Alan K., Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description
The Florida Carbonate Platform has been a relatively stable area of carbonate and clastic sediment accumulation since the late Cretaceous. The development of a paleostrait across the northern extent of this platform inhibited transport of clastic sediments below this point. Southward, such features as reefs, banks, and islands developed which eventually trapped sediments that form southern Florida. A reef tract which underlies the topographic highs that surround the present day Everglades...
Show moreThe Florida Carbonate Platform has been a relatively stable area of carbonate and clastic sediment accumulation since the late Cretaceous. The development of a paleostrait across the northern extent of this platform inhibited transport of clastic sediments below this point. Southward, such features as reefs, banks, and islands developed which eventually trapped sediments that form southern Florida. A reef tract which underlies the topographic highs that surround the present day Everglades encircled an inner continental sea during Pliocene-Pleistocene time. The development of a bank reef within this sea is indicated by a diverse coral and molluscan fauna. Collections of this fauna were made by the writer in an area in the upper Everglades known as the West Everglades High. The development of this reef and perpetuation of its form through the overlying stratigraphy became an important structural feature in the development of the Everglades in the Recent.
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Date Issued
1987
PURL
http://purl.flvc.org/fcla/dt/14384
Subject Headings
Paleogeography--Florida--Everglades
Format
Document (PDF)