ABSTRACTS
-
PUBLISHED
PAPERS
This page is of abstracts from selected published journal articles (see 'abbreviated vita') as scanned from the first page of the original publication. See 'full vita' for a complete list of publications. These publications are presented in chronological order. Brief anecdotal comments precede each abstract.
This is a seminal paper on
the forests of the Yucatan Peninsula that uses state of the art statistical
techniques to illucidate vegetation patterns at the landscape scale.
The paper is also valuable for it's quantification/description of individual
representative forests of the region. The listing of woody species
is not insignificant. I hope to followup this effort with a second
looking at patterns on a local scale. It was published in the international
'Journal of Vegetation Science.'
While on sabbatical leave at the Instituto de Ecologia in Xalapa, Mexico I spent some time at the La Mancha field station on the Gulf of Mexico coast just north of Veracruz. This paper resulted from a collaborative project that I was involved with while at the field station. It describes the germination ecology of 5 species of plants growing on the local sand dunes. My work was minor relative to the work by the many past and present researchers at La Mancha, although I learned a lot about sand dune ecology. This paper appeared in the Canadian Journal of Botany.
Since my days at Tulane University, I have been involving undergraduate students in research projects. Not only is this paper coauthored with one of those students, most of the field work for the paper involved student research on particular hardwood forests for several Honors in Biology projects. The paper focuses on describing forests that are example remnants of a vegetation type around New Orleans.
1995
This paper, on the forests
of the Yucatan, is the first to be published of several. The paper
is significant by it's quantitative description of the Peninsula's forest
vegetation. It's very much a floristic paper, too, in that tables
of the dominant trees and shrubs are presented, indicative of the continuum
of forest communities east-west across the northern Peninsula. The
paper also shows that forest species on two Mayan ruins are distinct from
the surrounding forest community.
1993
The Mississippi River delta
has been very little studied, partly because of accessibility and the unpredictability
of weather affording safe travel. This paper describes the colonization
and early development of plant communities on new mudflats. The mudflats
form when the River drops sediment in sufficient quantity to keep ahead
of natural subsidence processes. Since the delta is an area of the
State that has experienced huge wetland losses, any land formation and
subsequent plant succession is noteworthy. The newly developed mudflats
support a very large migratory bird population during the winter and therefore
this sort of study is of great interest to wildlife land managers.
1991
The Mississippi River delta
wetlands support huge monospecific stands of the 'roseau' cane, Phragmites
australis. The cane dominates the peripheral lands of the delta
and is most important as a buffer to powerful tropical storms that often
strike the region during summer and fall. This paper looks at the
population genetics of the dominant clonal types of the cane, and proposes
the likely series of events for establishment of the unique growth patterns
to the clones observed in the delta.
1988
The Pearl River is the southern-most
border between Mississippi and Louisiana. This paper reports on the
annual growth of herbaceous plants in the 3 dominant kinds of marshes in
the basin - fresh marsh, intermediate salinity marsh, and brackish marsh.
More importantly, the paper describes the incredible annual variation that
occurs in marsh production, a phenomena that has been described in marshes
in other parts of the world.
1987
Old growth forests in the
United States are incredibly rare due to human activity. This paper
is a descriptive study on such a forest located about an hour north of
New Orleans. It is a forest dominated by American beech and southern
magnolia, with a dense shrub understory of star anise (an evolutionarily
primitive flowering plant). This forest type is known to have dominated
small stream bottomlands throughout the Coastal Plain of the southeastern
United States.
1985
The fruits of the genus Illicium
are in the fossil record of the northeastern United States indicating that
this genus of small shrubs is one of the most primitive flowering plants
in North America. Two species are still found living in the United
States. lIlicium parviflorum is found in relictual populations
in the northern highlands of Florida, particularly around the clear springs
in Ocala National Park. This study documents the pollination process
in this species significantly showing that small flies play a large roll.
1983
The Pearl River is the southern
border between Louisiana and Mississippi. This paper presents the
results of my Ph.D. research. Using the technique of 'ordination',
the paper documents the continuum of vegetation change within the most
southern region of the floodplain of the Pearl River. The paper is
the first of several descriptive community studies I have published.
The paper clearly shows
that surface elevation (reflected in intensity of flooding) and salinity
play a large role in the wetland landscapes of the basin.
The following paper looks
at reproduction in the very primitive flowering plant, Illicium floridanum
found growing in sandy soils along small streams near the Gulf Coast, from
west to the Florida Parishes in Louisiana and east to the panhandle of
Florida. The study looks at pollination, flower and fruit development,
as well as seed production.
1982
Spartina alterniflora is the dominant plant in the most saline marshes of coastal Louisiana. Huge monospecific stands are common in this species from the Gulf coastal wetlands to the wetlands of New England. Decomposition of the plant is an important process to the ecology of salt marshes because the rate of decomposition regulates much of what happens in this ecosystem dominated, not by herbivores, but by 'detritivores' (organisms feeding off dead tissue). This paper looks at how fast Spartina decomposes by season.
1978
Louisiana has the most wetlands
of any state, excluding Alaska! This paper publishes the results
of my Masters thesis which documented the production and decomposition
of the most prevalent plants growing in the salt marshes along the coast
of Louisiana. It also hypothesized that the very high production
of the marshes could be a result of the large influx of nutrients from
the Mississippi River.