Seasonal Forest 的笔记如下: Summary: 1. The whole forest needs fungi to breath by the process of decomposition, trees need the network of hypha to develop underground. Fungi needs flying squirrels to travel their spores. 2. Caterpillars and herbivores give control on the distribution and the development of the trees, in which the hares are fed on the fallen trees, the lynx is fed on hares. 3. The whole forest is nourished by nitrogens from migrating salmons during the wet season with the help of other animals and the whole forest. where there are limited nutrients from the plants caused by the blushing of the rain. The salmons travel at the high water level season for laying their eggs at nutrient and oxygen rich section of the stream, which also makes a safe place from the forest shades for their eggs.
Fungi as the ultimate decomposers connects the whole ecosystem in forests, autumn is the best season for fungi sporocarps to germinate as the falls of the leaves. Flying squirrel as a night mammal, forge on fungus, carrying spores in their guts, gliding from tree to tree, defecates the spores to a new place, which makes a network of up to 10 square meters of a single fungus underground system with the help of the tree roots, in return the hypha helps the tree to grow and expand their own species, which is the reason of the domination of certain tree species.
Grizzly bear ecosystem: Grizzly plays a key role bring nitrogen to the forest. They feed on salmons during autumns (rain season) for accumulating calories for 5 months of survival of the coming winter (60,000 calories = 550 chocolate bars per day). They catch salmons and eat in the woods as it is safer there for protecting their cubs from other adult males. They eat only the fattest parts such as brains etc. and leave the rest on the forest ground. Other animals like banana slugs (the biggest slug in the world) eat the rest of the fish. The remains make good incubators for flies to lay their eggs on, the nutrients of the tree can be provided by the decomposition of the remains. And in the next spring, the bears are fed on the plants, which the nitrogen is composed by the fish parts that were abandoned by them the last winter. The DNA examination of the bear hair has proved that the bear has been fed on 80% of oceanic nitrogens which is mainly from the salmon. And according to the DNA examination of the tree, 85% of the nitrogen was also from the ocean. Salmon fuels are utilised and carried by all animals in the forests.
Temperature plummets by winter, Wood frogs and newly hatched painted turtles freeze solid, antifreeze in their blood keeps them alive until spring.
Moose, white-tailed deer, wolverines, birds, squirrels do not hibernate. Not easy for some animals to survive the winter as it is too cold for them, their death brings food to small scavengers animals.
The lynx feeds on snowshoe hares during winters. The population of hares and lynx are correlated. And the population of the hares is correlated with the budworms which bring the falls of the trees.
生态网当中的物种们之间的所有关系类型:竞争、捕食、防御、借刀杀人、寄生、轻度敌对、中立共处、共生、等等
bbc纪录片总给你一种怎么拍都不会重样地感觉,如讲生命间相互依存、联系的食物链,不就是虾米吃污泥,大鱼吃小鱼?似乎没甚稀奇。但bbc永远紧跟前沿科研步伐,以最新生物、科学知识引领你进入新奇的未知领域;如,过去认为保护林木就要大量喷洒农药杀灭毛虫,但事实证明不喷农药会有意想不到的情况发生
神奇的自然界,需要人类的探索和敬畏!BBC的纪录片一直是业界翘楚,无法超越!
丛林、草原、季节森林、水域。
很美!我喜欢大自然!话说,虽然不确定睡眠是不是真理,但看起来吃饭一定是真理了!!😋
热带雨林,第四集潘塔纳尔湿地,
How ecosystem works.
意想不到的动植物关系
讲的比较表象,但已经能够一定程度上揭示生物链的概念了。
万物互相效力
这个就是Secrets of Our Living Planet……
动植关系的科教片,纯说理
根本停不下来
越是想操控什么什么就越会失控…天气不似预期,不要跟自然规律作对,融入自然才是王道。
了解自然的法则。雨林、草原、森林、水世界。
解释了食物链和共存关系,开阔视野了。
很好看的纪录片,讲的是大自然动植物间的有趣交汇
搁在网易公开课看的,不得不说国外拍这种纪录片手法比国内强多了大自然啊,人类还是要敬畏生命尊重自然啊。
BBC滤镜,素材还是挺充足的。
这个世界的联系远比我们想象中多,生态系统的运作太神奇了,浑然天成一个循环。seasonal forest里的鲑鱼食物链和蚜虫食物链实在是让人大开眼界,还有waterworlds里的福寿螺,没想到它竟然对生态系统的发展这么有益,呼吸管实在是太厉害了。小时候还讨厌它呢。