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Xerophytic plants exhibit a diversity of specialized adaptations to survive in such water-limiting conditions. They may use water from their own storage, allocate water specifically to sites of new tissue growth, or lose less water to the atmosphere and so channel a greater proportion of water from the soil to photosynthesis and growth.
Not enough fire: Strangely, this plant doesn't just survive harsh conditions like wildfires, it needs them to thrive. Lack of controlled burning can threaten the four-petal pawpaw's population.
Tender plants are those killed by freezing temperatures, while hardy plants survive freezing—at least down to certain temperatures, depending on the plant. "Half-hardy" is a term used sometimes in horticulture to describe bedding plants which are sown in heat in winter or early spring, and planted outside after all danger of frost has passed.
[5] [6]: 119 It is less well adapted to harsh alpine conditions than some other alpine zone plants, having relatively (to 4 inches (10 cm)) large leaves that are mostly hairless, and correspondingly is found growing in more protected sites, such as grassy meadows.
The harsh climate of most desert regions is a major obstacle in conducting research into these ecosystems. In the environments requiring special adaptations to survive, it is often difficult or even impossible for researchers to spend extended periods of time investigating the ecology of such regions.
They are classified as r selected species, with high mortality, quick reproduction, and a distinct ability to survive in harsh and nutrient-low conditions. In contrast, ecological development after primary succession completes often leads to a more heavily k selected population, which has lower mortality and slower reproduction rates.
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