Expert Answers » Coastal Bluffs
Coastal Bluffs Tags
Tag based links for
The following links have been tagged Coastal Bluffs by users just like you, because these resources are off-site we cannot guarantee the accuracy or quality of any third-party information.
- Using Remote
Sensing to
Reassess the
Mass Mortality
of Diadema
antillarum
1983-1984: Conservation
Biology, Vol.
15, No. 4.
(2001), pp.
885-891.The
1983-1984 mass
mortality of
the sea urchin
Diadema
antillarum
remains one of
the most
severe
die-offs ever
recorded in
the Caribbean.
Before 1983,
the herbivore
D. antillarum
was pervasive
on coral reefs
in the region.
Nine months
after first
detection of
the mass
mortality, 95%
of the urchins
had perished,
and algal
cover of coral
increased
between 100%
and 250%. A
water-borne
pathogen was
hypothesized
as the
causative
agent, but it
was never
isolated. To
date, surface
current
patterns have
been used
exclusively to
explain both
the cause and
the
distribution
patterns of
the mortality
event. Using
archived
satellite
images, we
re-examined
the
water-borne
pathogen
hypothesis and
investigated
whether other
mechanisms
could also
account for
the
dissemination
pattern in
some areas. In
addition,
archived
satellite
images were
utilized to
detect changes
in coral reef
reflectance.
For infections
in the Gulf of
Mexico and
Bermuda,
satellite
images confirm
that surface
currents are
likely
responsible
for the
distribution
of the
pathogen. For
infections in
the eastern
Caribbean
(Curacao, U.S.
Virgin
Islands,
Barbados),
however,
another
mechanism,
possibly
ballast water
exchange, must
be considered
because the
surface
current and
infection
patterns do
not coincide.
Changes in
coral
reflectance
were
detectable
from Landsat
thermatic
mapping data
before and
after the mass
mortality and
correspond to
the change in
algal cover.
Results from
our study
demonstrate
the potential
of satellite
images for use
in determining
connectivity
between
regions of the
Caribbean and
in detecting
changes in
coral reef
cover.
Utilizacion de
Percepcion
Remota para
Reanalizar la
Mortandad
Masiva de
Diadema
antillarum de
1983-1984
Resumen: El
evento de
mortandad
masiva de
1983-1984 del
erizo de mar
Diadema
antillarum se
mantiene como
uno de los
eventos de
mortandad
masiva mas
severos de que
se tengan
registros en
el Caribe.
Antes de 1983,
el herviboro
D. antillarum,
abundaba en
los arrecifes
de coral de la
region. Nueve
meses despues
de la
deteccion de
la mortandad
masiva, 95% de
los erizos
fallecieron y
la cobertura
de algas sobre
el coral se
incremento
entre 100 y
250%. Se
establecio la
hipotesis de
que el agente
causante fue
un patogeno de
origen
acuatico, pero
nunca fue
aislado. A la
fecha, los
patrones de
corrientes
superficiales
han sido
usados
exclusivamente
para explicar
tanto el
agente causal
como los
patrones de
distribucion
de la
mortandad.
Utilizando
imagenes de
archivo de
satelite,
re-examinamos
la hipotesis
del agente de
origen
acuatico e
investigamos
si otros
mecanismos
podrian
tambien ser
considerados
en los
patrones de
diseminacion
de algunas
areas. Para
infecciones
del Golfo de
Mexico y
Bermudas, las
imagenes de
satelite
confirman que
las corrientes
superficiales
son los
responsables
mas probables
de la
distribucion
del patogeno.
Sin embargo,
para
infecciones en
el Este del
Caribe
(Curacao,
U.S., Islas
Virginia,
Barbados),
otro
mecanismo,
posiblemente
el cambio de
agua de
lastre, podria
ser
considerado
debido a que
las corrientes
superficiales
y los patrones
de infeccion
no coinciden.
Se detectaron
cambios en la
reflectancia
del coral por
medio de datos
del mapeador
tematico
Landsat antes
y despues de
la mortandad
masiva, mismos
que
correspondiero
n con los
cambios en la
cobertura
algal. Los
resultados de
nuestro
estudio
demuestran el
potencial de
usar imagenes
de satelite
para
determinar la
conectividad
entre regiones
del Caribe y
para detectar
cambios en la
cobertura del
arrecife
coralino.
Source: Conservation Biology, Vol. 15, No. 4. (2001), pp. 885-891. - Man's Role in
Changing the
Face of the
Ocean:
Biological
Invasions and
Implications
for
Conservation
of Near-Shore
Environments: Conservation
Biology, Vol.
3, No. 3.
(1989), pp.
265-273.Human
activities,
primarily the
global
movement of
organisms
associated
with
ocean-going
vessels and
with
commercial
fishery
products, have
lead to the
redistribution
of a vast
number of
marine
organisms over
the past five
centuries.
Most
biological
surveys
postdated
these
transport
events, so the
distribution
of many of
these now
cosmopolitan
species has
been
interpreted as
the result of
natural
processes,
leading to
underestimates
of the role of
humans in
altering
patterns of
natural
diversity and
distribution
of marine
organisms
along the
coastal
margins of the
world
Perceptions of
the natural
state of some
systems versus
their recent
ecological
alteration are
illustrated by
the National
Estuarine
Reserve
Research
System, within
which many
"natural"
sanctuaries
have been
highly altered
by exotic
species The
modern scale
and rate of
new
human-mediated
invasions in
the ocean are
difficult to
recognize due
to the lack of
communication
among
scientists
working with
different
groups of
organisms,
different
habitats, and
different
regions.
Available
evidence
suggests that
introductions
continue
unabated on a
large scale
throughout the
world Despite
the existence
since 1973 of
a number of
international
conventions to
control the
movement of
exotic marine
organisms
adequate
control still
occurs largely
at the
regional and
local levels.
La
reorganizacion
de una gran
cantidad de
organismos
marinos en los
Sultimos 5
siglos se debe
a actividades
humanus,
especialmente
a
desplazamiento
s globales de
organismos
asociados con
embarcaciones
marinus y con
productos
pesqueros
comerciales La
mayoria de
encuestas
biologicas
posfechan
dichos eventos
de
transportacion
, y por
consecuencia
se intetpreta
la
distribucion
de muchas de
estas
especies, hoy
cosmopolitas,
como resultado
de pcesos
naturales,
subestimando
el rol humano
en la
alteracion de
la diversidad
natural y en
la
distribucion
de organismos
marinos en los
margenes
costeros del
mundo. Se
ilustran
percepciones
sobre el
estado natural
de algunos
sistemas
versus su
reciente
alteracion
ecologica en
el "NATIONAL
ESTUARINE
RESERVE
RESEARCH
SYSTEM,"
dentro del
cual muchos
santuarios
"naturales"
han sido
fuertemente
alterados por
especies
exoticas
Debido a la
falta de
comunicacion
entre los
cientificos
que trabajan
con diferentes
grupos de
organismos,
habitats y
regiones, es
drficil
reconocer la
escala y tasa
de las
invasiones
recientes en
los oceanos,
causados por
actividades
humanas.
Evidencias
disponibles
sugieren que
las
introducciones
continuan en
gran escala en
todo el mundo.
A pesar que
desde 1973 se
han
establecido
numerosas
convenciones
internacionale
s con el
motivo de
controlar el
desplazamiento
de otganismos
exoticos
marinos, un
control
adecuado solo
ocurre en los
niveles
locales y
regionales.
Source: Conservation Biology, Vol. 3, No. 3. (1989), pp. 265-273. - Conservation
of Marine and
Coastal
Biodiversity
in Brazil: Conservation
Biology, Vol.
19, No. 3.
(June 2005),
pp. 625-631.
Source: Conservation Biology, Vol. 19, No. 3. (June 2005), pp. 625-631. - Coastal
Ecosystem-Base
d Management
with Nonlinear
Ecological
Functions and
Values: Science, Vol.
319, No. 5861.
(18 January
2008), pp.
321-323.A
common
assumption is
that ecosystem
services
respond
linearly to
changes in
habitat size.
This
assumption
leads
frequently to
an "all or
none" choice
of either
preserving
coastal
habitats or
converting
them to human
use. However,
our survey of
wave
attenuation
data from
field studies
of mangroves,
salt marshes,
seagrass beds,
nearshore
coral reefs,
and sand dunes
reveals that
these
relationships
are rarely
linear. By
incorporating
nonlinear wave
attenuation in
estimating
coastal
protection
values of
mangroves in
Thailand, we
show that the
optimal land
use option may
instead be the
integration of
development
and
conservation
consistent
with
ecosystem-base
d management
goals. This
result
suggests that
reconciling
competing
demands on
coastal
habitats
should not
always result
in stark
preservation-v
ersus-conversi
on choices.
10.1126/scienc
e.1150349
Source: Science, Vol. 319, No. 5861. (18 January 2008), pp. 321-323. - Significant
contribution
of the 18.6
year tidal
cycle to
regional
coastal
changes: Nature Geosci,
Vol. 1, No. 3.
(March 2008),
pp. 169-172.
Source: Nature Geosci, Vol. 1, No. 3. (March 2008), pp. 169-172.
If you would like to find additional social bookmark based links on the topic of Coastal Bluffs we recommend the Open Tag Directory > Coastal Bluffs. If you would like to find related tags we recommend Tag Patterns > Coastal Bluffs.
Coastal Bluffs Tag Pages:
Coastal Bluffs Tag Pages:
