This document summarizes a research project studying the effects of beach nourishment on temperature-dependent sex determination in loggerhead sea turtle hatchlings on Bald Head Island. The researcher will monitor temperatures in nests on nourished and non-nourished beaches using sensors, and analyze the data to determine if beach nourishment affects average nest temperatures and the male to female hatchling ratio. The researcher predicts that nourished beaches will have higher average temperatures producing more female hatchlings.
Scientific talk on effects of climate variation and young fish
- general ideas about climate effects on marine ecosystems
- variations in temperature-zooplankton-North Sea cod
- spatial population structure and detecting climate effects
Salmonid gene expression biomarkers indicative of physiological responses to ...BARRY STANLEY 2 fasd
“Yet, life stage and overall condition can dictate tolerance thresholds to heightened environmental stressors, such that stress may not be equally felt across individuals within a species."
Behavioral responses to annual temperature variationalter th.docxtaitcandie
Behavioral responses to annual temperature variation
alter the dominant energy pathway, growth, and
condition of a cold-water predator
Matthew M. Guzzoa,1, Paul J. Blanchfielda,b, and Michael D. Renniea,c,d
aDepartment of Biological Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; bFreshwater Institute, Fisheries and Oceans Canada, Winnipeg,
MB R3T 2N6, Canada; cDepartment of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada; and dIISD Experimental Lakes Area Inc., Winnipeg,
MB R3B 0T4, Canada
Edited by Mary E. Power, University of California, Berkeley, CA, and approved July 11, 2017 (received for review February 17, 2017)
There is a pressing need to understand how ecosystems will
respond to climate change. To date, no long-term empirical studies
have confirmed that fish populations exhibit adaptive foraging
behavior in response to temperature variation and the potential
implications this has on fitness. Here, we use an unparalleled 11-y
acoustic telemetry, stable isotope, and mark–recapture dataset to
test if a population of lake trout (Salvelinus namaycush), a cold-
water stenotherm, adjusted its use of habitat and energy sources
in response to annual variations in lake temperatures during the
open-water season and how these changes translated to the
growth and condition of individual fish. We found that climate
influenced access to littoral regions in spring (data from teleme-
try), which in turn influenced energy acquisition (data from iso-
topes), and growth (mark–recapture data). In more stressful years,
those with shorter springs and longer summers, lake trout had
reduced access to littoral habitat and assimilated less littoral en-
ergy, resulting in reduced growth and condition. Annual variation
in prey abundance influenced lake trout foraging tactics (i.e., the
balance of the number and duration of forays) but not the overall
time spent in littoral regions. Lake trout greatly reduced their
use of littoral habitat and occupied deep pelagic waters during
the summer. Together, our results provide clear evidence that
climate-mediated behavior can influence the dominant energy
pathways of top predators, with implications ranging from indi-
vidual fitness to food web stability.
food web | climate change | habitat coupling | lake trout |
north-temperate lake
There is growing urgency to understand how ecosystems areresponding to climate change (1, 2). Recent work, using
latitudinal gradients as proxies to warming, has argued that the
behavioral responses of mobile top predators to changing tem-
peratures can drive fundamental shifts in aquatic food webs by
altering the coupling of major energy pathways (3, 4). Although
this work is intriguing, no one has yet examined long-term em-
pirical data that have explicitly tested if populations of top
predators can shift their foraging behavior in response to annual
changes in temperature or has evaluated what implications this
might have for individual fitness. Tempor.
Environmental effects on fish populations: Some principles, some examples, and comparisons between large ecosystems from the Mediterranean to the Barents Sea
Scientific talk on effects of climate variation and young fish
- general ideas about climate effects on marine ecosystems
- variations in temperature-zooplankton-North Sea cod
- spatial population structure and detecting climate effects
Salmonid gene expression biomarkers indicative of physiological responses to ...BARRY STANLEY 2 fasd
“Yet, life stage and overall condition can dictate tolerance thresholds to heightened environmental stressors, such that stress may not be equally felt across individuals within a species."
Behavioral responses to annual temperature variationalter th.docxtaitcandie
Behavioral responses to annual temperature variation
alter the dominant energy pathway, growth, and
condition of a cold-water predator
Matthew M. Guzzoa,1, Paul J. Blanchfielda,b, and Michael D. Renniea,c,d
aDepartment of Biological Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; bFreshwater Institute, Fisheries and Oceans Canada, Winnipeg,
MB R3T 2N6, Canada; cDepartment of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada; and dIISD Experimental Lakes Area Inc., Winnipeg,
MB R3B 0T4, Canada
Edited by Mary E. Power, University of California, Berkeley, CA, and approved July 11, 2017 (received for review February 17, 2017)
There is a pressing need to understand how ecosystems will
respond to climate change. To date, no long-term empirical studies
have confirmed that fish populations exhibit adaptive foraging
behavior in response to temperature variation and the potential
implications this has on fitness. Here, we use an unparalleled 11-y
acoustic telemetry, stable isotope, and mark–recapture dataset to
test if a population of lake trout (Salvelinus namaycush), a cold-
water stenotherm, adjusted its use of habitat and energy sources
in response to annual variations in lake temperatures during the
open-water season and how these changes translated to the
growth and condition of individual fish. We found that climate
influenced access to littoral regions in spring (data from teleme-
try), which in turn influenced energy acquisition (data from iso-
topes), and growth (mark–recapture data). In more stressful years,
those with shorter springs and longer summers, lake trout had
reduced access to littoral habitat and assimilated less littoral en-
ergy, resulting in reduced growth and condition. Annual variation
in prey abundance influenced lake trout foraging tactics (i.e., the
balance of the number and duration of forays) but not the overall
time spent in littoral regions. Lake trout greatly reduced their
use of littoral habitat and occupied deep pelagic waters during
the summer. Together, our results provide clear evidence that
climate-mediated behavior can influence the dominant energy
pathways of top predators, with implications ranging from indi-
vidual fitness to food web stability.
food web | climate change | habitat coupling | lake trout |
north-temperate lake
There is growing urgency to understand how ecosystems areresponding to climate change (1, 2). Recent work, using
latitudinal gradients as proxies to warming, has argued that the
behavioral responses of mobile top predators to changing tem-
peratures can drive fundamental shifts in aquatic food webs by
altering the coupling of major energy pathways (3, 4). Although
this work is intriguing, no one has yet examined long-term em-
pirical data that have explicitly tested if populations of top
predators can shift their foraging behavior in response to annual
changes in temperature or has evaluated what implications this
might have for individual fitness. Tempor.
Environmental effects on fish populations: Some principles, some examples, and comparisons between large ecosystems from the Mediterranean to the Barents Sea
Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
Situated in Pondicherry, India, Kuddle Life Foundation is a charitable, non-profit and non-governmental organization (NGO) dedicated to improving the living standards of coastal communities and simultaneously placing a strong emphasis on the protection of marine ecosystems.
One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
Our Instagram channel:
@kuddlelifefoundation
Our Linkedin Page:
https://www.linkedin.com/company/kuddlelifefoundation/
and write to us if you have any questions:
info@kuddlelife.org
"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...MMariSelvam4
The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
Characterization and the Kinetics of drying at the drying oven and with micro...Open Access Research Paper
The objective of this work is to contribute to valorization de Nephelium lappaceum by the characterization of kinetics of drying of seeds of Nephelium lappaceum. The seeds were dehydrated until a constant mass respectively in a drying oven and a microwawe oven. The temperatures and the powers of drying are respectively: 50, 60 and 70°C and 140, 280 and 420 W. The results show that the curves of drying of seeds of Nephelium lappaceum do not present a phase of constant kinetics. The coefficients of diffusion vary between 2.09.10-8 to 2.98. 10-8m-2/s in the interval of 50°C at 70°C and between 4.83×10-07 at 9.04×10-07 m-8/s for the powers going of 140 W with 420 W the relation between Arrhenius and a value of energy of activation of 16.49 kJ. mol-1 expressed the effect of the temperature on effective diffusivity.
WRI’s brand new “Food Service Playbook for Promoting Sustainable Food Choices” gives food service operators the very latest strategies for creating dining environments that empower consumers to choose sustainable, plant-rich dishes. This research builds off our first guide for food service, now with industry experience and insights from nearly 350 academic trials.
UNDERSTANDING WHAT GREEN WASHING IS!.pdfJulietMogola
Many companies today use green washing to lure the public into thinking they are conserving the environment but in real sense they are doing more harm. There have been such several cases from very big companies here in Kenya and also globally. This ranges from various sectors from manufacturing and goes to consumer products. Educating people on greenwashing will enable people to make better choices based on their analysis and not on what they see on marketing sites.
Beach Nourishment and its Effect on Sex Determination of Loggerhead Hatchlings
1. BEACH NOURISHMENT AND ITS
EFFECT ON SEX DETERMINATION
OF LOGGERHEAD HATCHLINGS
Heather Hoffmann
Sea Turtle Intern at Bald Head Island
Conservancy
2. BACKGROUND
¢ Temperature dependent sex determination
¢ Thermosensitive period
— 7-15 days in middle third of incubation
¢ Hormones in TSD systems
— Aromatase enzyme affected by temperature
3. BACKGROUND
¢ Bald Head Island
— Northern nesting point
¢ Beach nourishment becoming a problem
— Effect on male to female ratio?
¢ Human impact on endangered species
4. INTRODUCTION
¢ Summer research project with BHIC
¢ Understand effects of beach nourishment on nest
temperature
¢ Temperature sensors in nests
¢ Nourished and non-nourished beaches
¢ Beach nourishment and its affect on temperature
dependent sex determination of Loggerhead sea
turtle (Caretta caretta) hatchlings on Bald Head
Island.
5. POTENTIAL QUESTIONS
1. Does beach nourishment affect sea turtle
hatchlings?
2. What is the average temperature profile in
nests over the entire incubation period?
3. How does metabolic heating affect temperature
within the nest?
4. Is there a correlation between average nest
temperature and incubation time?
5. How does average nest temperature affect
survival rates of the nest?
6. Is beach nourishment affecting male to female
ratios of hatchlings?
6. GENERAL HYPOTHESIS
¢ Based on preliminary background research I
predict that nourished beaches will generally
have higher average nest temperatures resulting
in more female hatchlings
7. MATERIALS AND METHODS
¢ 20 temperature sensors
— Middle of nest while laying
— Removed during excavations
¢ Nourished and non-nourished beaches
¢ Control logger 1 meter to the left
¢ Sensors record average temp for 50-70 days
8. CONCLUSION
¢ Waiting to collect loggers
¢ Analyze data and determine if correlations exist
¢ Using data for honors thesis at OSU
9. WORKS CITED
DeGregorio, B.A. and A.S. Williard. 2011. Incubation temperatures and metabolic
heating of relocated and in situ loggerhead sea turtle (Caretta caretta) nests
at a northern Rookery. Chelonian Conservation and Biology 10(1): 54-61
Hawkes, L.A., A.C. Broderick, M.H. Godfrey and B.J. Godley. 2005. Status of
nesting loggerhead turtles Caretta caretta at Bald Head Island (North
Carolina, USA) after 24 years of intensive monitoring conservation. ORYX 39
(1): 65-72.
Hawkes, L.A., A.C. Broderick, M.H. Godfrey and B.J. Godley. 2007. Investigating
the potential impacts of climate change on a marine turtle population. Global
Change Biology 13: 1-10.
Rumbold, D.G, P.W. Davis and C. Perretta. 2001. Estimating the effect of beach
nourishment on Caretta caretta (Loggerhead Sea Turtle) nesting. Society for
ecological restoration (1): 304-310.
