- Nov 2024
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journals.plos.org journals.plos.org
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The general lesson is that spatial heterogeneity may be more important for predation dynamics than is at first apparent, particularly for terrestrial mammalian systems.
I wonder if they repeated this study after a high disturbance event such as a extremely cold winte or a wildfire, would we see the same thing or would there be a change in the way predator prey interacts within a changed landscape.
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prime moose were more likely to be killed by wolves in shoreline habitats
This makes sense as the wolves travel along the shorelanine and stay out of the forest as they will more likely spot an unsuspecting moose. The Sensient moose would most likely be tracked and broght down near a clearing , it also becomes less aware yet it avoids the shore more often.
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it is rare for wolves on Isle Royale to kill a cow and a calf at the same time.
The only time we could possibly see this is if food is so incredibly scarce and the winter is just sheere brutal. To bring down a moose the wolf paack has the chance to lose individuals in the process,, the calf would be easy but the mother would put up a fight so hard that there could be fatalities within the wolfpack. This attmpt would be rare and have to be in extremely dire circumstances otherwise its a waste of energy and individuals. If parts of the wolf pack die, the total population declines as well as removing potentially good genes from the gene pool.
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On Isle Royale, the spatial configuration of winter predation risk is well understood. For example, habitats along the Lake Superior shoreline tend to be riskier for moose because they are visited more frequently by packs of widely ranging cursorial wolves [20]. However, shoreline habitats tend to have improved foraging opportunities for moose and to be lower in elevation.
This appears as an example of an ecological tradeoff and many cases we see similar trade offs at watering holes and other large areas where primary consumers gather. The tradeoff is the moose either decreases its time foraging thus being more efficient on energy bu trisks getting killed or attacked by wolves. If the moose does not forage on the bank then it's foraging time increases requirng more energy, it benefit sonly from protection aginst being spotted or attacked.
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habitat heterogeneity
Habitat heterogenuity-Basically the moore habitats that are present in a landscape, the higher the diversity of species found there. so if this landscape varies its ecosytem amodels and relationship should be diverse.
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- Sep 2024
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link.springer.com link.springer.com
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These results serve as a cautionary tale for restoration efforts that focus on single species coral resilience rather than ecosystem function.
In reef restoration it is critical to replace reef loss with the native corals that were there and we have to research how each coral impacts the total ecosystem so one coral does not become dominant displacing other species.
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Yet phase shifts to monospecific coral assemblages have been less well documented. Here, we studied an unusual shift, from a diverse stony coral system, to a system where a single stony coral becomes predominant and vastly modifies the overall ecology of the reef as a result (Crane et al.
could there have been a greater competition between that species and others . Was this one was more fit and were it's reproduction rates were better?
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The fact that only two individuals out of 138 were genetically identical suggests that sexual reproduction is likely to be a dominant feature of Montipora sp.1 aff. capitata in Ulithi.
this indicates the accuracy and precision these scientists went through to provide better information for thier study.
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We carried out the final PCR amplification step in 50 μl reaction volumes with 10 amplification cycles. Ampure XP beads (Agencourt) were used for each purification step and size selection.
I remember pcr technique being used during Bio 1500. It was a method to extract DNA. Would they then run an gel electrophoresis then look for sequencing patterns on a genome library?
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Samples were immediately placed in 95% ethanol and kept at ambient temperature until reaching the laboratory where they were stored at − 20 °C.
How would that solution help preserve corals. Would the ethanol kill the corals? Could this stress the corals and mess with the study?
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By then, reefs had already been severely disturbed by major rearrangements that happened during World War II, where several hundred ships, landing crafts, and thousands of US Naval personnel had staged out of the Atoll (Lessa 1966).
The whole world suffered during this conflict. Ecosystems as well suffered due to firebombing, lead contamination, nuclear testing, ships being blown apart, and diseased bodies were growing in number. The coral reefs of the indo-pacific had already been stressed that a typhoon could easilyly disturb the reefs.
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