Effects of Climate Change on Marine Ecosystems:
- Ocean acidification: Absorption of carbon dioxide from the atmosphere lowers ocean pH, making it more difficult for marine organisms such as corals, shellfish, and plankton to build their protective shells and skeletons.
- Rising sea temperatures: Coral bleaching and mortality, disruption of fish spawning and migration patterns, and altered species distribution and abundance.
- Sea level rise: Coastal erosion, flooding of low-lying habitats, and loss of nursery and spawning grounds for marine species.
- Increased frequency and intensity of extreme weather events: Storms and hurricanes can damage coral reefs, disrupt food webs, and lead to species loss.
- Changes in ocean currents: Altered distribution of nutrients and marine life, affecting fisheries and food security.
- Reduced oxygen levels: Warming waters hold less oxygen, creating "dead zones" where marine organisms cannot survive.
Effects of Climate Change on Terrestrial Ecosystems:
- Increased frequency and intensity of droughts: Stresses plants, reduces crop yields, and increases wildfire risk.
- Altered precipitation patterns: Changes in timing, amount, and intensity of rainfall, affecting vegetation distribution and water availability.
- Rising temperatures: Heat stress can lead to plant mortality, altered species distribution, and increased pest and disease outbreaks.
- Extreme weather events: Storms, floods, and wildfires can cause widespread damage to forests, wetlands, and grasslands.
- Changes in species interactions: Altered competitive relationships, predator-prey dynamics, and pollination patterns.
- Degradation and fragmentation of habitats: Climate change can lead to habitat loss, fragmentation, and reduced connectivity for terrestrial species.
Comparison of Effects:
Similarities:
- Both marine and terrestrial ecosystems experience altered species distributions, abundance, and interactions.
- Extreme weather events can impact both types of ecosystems.
Differences:
- Ocean acidification: A unique challenge for marine ecosystems, affecting the ability of organisms to build and maintain protective structures.
- Sea level rise: Impacts coastal marine ecosystems directly, while terrestrial ecosystems are primarily affected by droughts and heat stress.
- Dependence on water: Marine ecosystems rely on water for sustenance, while terrestrial ecosystems are more adaptable to fluctuations in water availability.
- Connectivity: Marine organisms have a higher degree of connectivity compared to terrestrial species, facilitating dispersal and genetic exchange.
Overall, climate change has significant and interconnected impacts on both marine and terrestrial ecosystems, threatening their biodiversity, productivity, and resilience. Mitigation and adaptation strategies are crucial to minimize these effects and protect the health of these vital ecosystems.