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Related Concept Videos

Global Climate Change01:50

Global Climate Change

Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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Energy Budgets and Reproductive Strategies

Organisms must balance energy intake with the energy required for growth, maintenance, and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species reproduce only once in their lifetime, often investing most available resources into that single reproductive event. Iteroparous species, by contrast, reproduce multiple times over their lifetimes, typically allocating fewer resources to any single...
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The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
Microbes and Climate Change01:27

Microbes and Climate Change

Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...

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Related Experiment Video

Updated: Jun 1, 2026

Data Collection on Marine Litter Ingestion in Sea Turtles and Thresholds for Good Environmental Status
13:18

Data Collection on Marine Litter Ingestion in Sea Turtles and Thresholds for Good Environmental Status

Published on: May 18, 2019

Long-term climate forcing in loggerhead sea turtle nesting.

Kyle S Van Houtan1, John M Halley

  • 1Marine NOAA Fisheries Service, Pacific Islands Fisheries Science Center, Honolulu, Hawaii, United States of America. kyle.vanhoutan@gmail.com

Plos One
|May 19, 2011
PubMed
Summary
This summary is machine-generated.

Marine turtle populations are synchronized and influenced by ocean conditions, with climate models explaining 88% of changes. Future forecasts predict declines in the Pacific but increases in the Atlantic loggerhead sea turtle populations.

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Area of Science:

  • Marine Biology
  • Climate Science
  • Conservation Science

Background:

  • Long-term variability in marine turtle populations is poorly understood, hindering conservation efforts.
  • Oceanographic processes significantly influence marine species population dynamics, yet their impact on sea turtles is understudied.

Purpose of the Study:

  • To investigate the influence of oceanographic processes on loggerhead sea turtle (Caretta caretta) nesting and population dynamics.
  • To develop and apply climate-based models for estimating sea turtle nesting at various spatial and temporal scales.

Main Methods:

  • Utilized basin-scale climate indices and regional surface temperatures to model loggerhead sea turtle nesting.
  • Applied methods adapted from fisheries research to link oceanographic conditions to juvenile recruitment and population regulation.
  • Employed climate models to explain observed population changes over recent decades.

Main Results:

  • Loggerhead sea turtle populations in the North Pacific and Northwest Atlantic are regionally synchronized and strongly correlated with ocean conditions.
  • Climate models alone explained up to 88% of observed population changes over the past several decades.
  • Hindcasts suggest climate may have contributed to recent population declines, with future forecasts indicating a significant reduction in the Pacific population by 2040 and a substantial increase in the Atlantic population.

Conclusions:

  • Oceanographic conditions are a significant driver of marine turtle population variability and persistence.
  • Climate-based modeling provides mechanistic forecasts for sea turtle populations, highlighting the importance of environmental baselines in conservation assessments.
  • While not excluding anthropogenic impacts, this study underscores the critical role of bottom-up oceanographic processes for marine organisms.