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Two trees may grow to their mature size adjacent to each other and seemingly grow together or conjoin, demonstrating inosculation. These may be of the same species or even of different genera or families, depending on whether the two trees have become truly grafted together (once the cambium of two trees touches, they self-graft and grow together).
Secondary succession is the secondary ecological succession of a plant's life. As opposed to the first, primary succession, secondary succession is a process started by an event (e.g. forest fire, harvesting, hurricane, etc.) that reduces an already established ecosystem (e.g. a forest or a wheat field) to a smaller population of species, and as such secondary succession occurs on preexisting ...
Small bushes and trees begin to colonize the area; Fast-growing evergreen trees develop to their fullest, while shade-tolerant trees develop in the understory; The short-lived and shade-intolerant evergreen trees die as the larger deciduous trees overtop them. The ecosystem is now back to a similar state to where it began.
One of the most credible science-based concerns with GM trees is their potential for wide dispersal of seed and pollen. [11] The fact that pine pollen travels long distances is well established, moving up to 3,000 kilometers from its source. [12] Additionally, many tree species reproduce for a long time before being harvested. [13]
If the forest is replaced with only one species of tree and all other vegetation is prevented from growing back, a monoculture forest similar to agricultural crops would be the result. However, most reforestation involves the planting of different selections of seedlings taken from the area, often of multiple species.
There has been debate over how plant populations move under rapid climate change situations. [6] [7] This debate stems from an issue called "Reid's paradox of rapid plant migration". [6] After the last glacial period, tree species spread to recover the newly exposed land.
Some live only in pairs as adults, others like American crows, can have extended family groups on one territory, others, like fish crows, live in larger groups of unrelated birds of many ages ...
The savannah hypothesis (or savanna hypothesis) is a hypothesis that human bipedalism evolved as a direct result of human ancestors' transition from an arboreal lifestyle to one on the savannas. According to the hypothesis, hominins left the woodlands that had previously been their natural habitat millions of years ago and adapted to their new ...