Wringed seals have birth in layers carved out of patch. No drifts, which abiotic change may increase up mortality reduced. Snowfall reduce polar bear population reduced carbon dioxide or reduced temperatures
There seems to be some confusion in your question, but I will try to address each component separately:
1. Wringed seals (suggested correction: ringed seals) give birth in layers carved out of the ice. This is correct. Ringed seals create birth lairs in the snow or ice to protect their young from predation and harsh weather conditions.
2. No drifts: I'm not sure what you are referring to here. If you mean that the birth lairs are not affected by snow drifts, it may depend on the specific location and conditions. Snow drifts could potentially impact the accessibility and survival of the lairs, but more information is needed to provide a definitive answer.
3. Abiotic changes that may increase mortality: If there are significant abiotic changes, such as reduced snowfall, reduced temperatures, or changes in carbon dioxide (CO2) levels, it could potentially impact the survival of ringed seals. However, the specific effects would depend on the magnitude and duration of these changes, as well as how the seals adapt and respond to new conditions.
4. Snowfall, polar bear population, CO2, and reduced temperatures: Again, I'm not certain about the relationship you are suggesting here. Snowfall generally provides insulation and protection for ringed seal birth lairs, so reduced snowfall could potentially expose the vulnerable pups to harsher conditions, increasing mortality. However, the factors you mentioned, such as reduced polar bear population, reduced CO2, or reduced temperatures, do not directly relate to the impact of reduced snowfall on ringed seals.
Overall, it is important to consider the specific ecological context and interconnections between various factors to accurately assess the potential impacts on ringed seals or any ecosystem.