立场多样性并不能缓解气候匹配的树在辅助迁移实验中增加的草食
Juri A Felix1,2, Philip C Stevenson2,3, Nadia Barsoum4
1Department of Biological Sciences, Royal Holloway University of London, Egham, UK.
Plant, cell & environment
|January 14, 2025
概括
树木的辅助迁移可能会增加草食. 混合物种或来源的森林的多样化可以减轻这种情况,但需要进一步研究气候相匹配的树木和昆虫害虫的影响.
科学领域:
- 林业林业 林业 林业 林业
- 生态生态学 生态生态学
- 适应气候变化 适应气候变化
背景情况:
- 辅助迁移旨在通过转移树木种群来创造适应气候变化的森林.
- 转移的树木可能面临着对草食动物的敏感性增加.
- 种群多样化的有效性在缓解气候相匹配的树木上的草食性方面未得到充分研究.
研究的目的:
- 为了比较当地和意大利来源的树 (Quercus robur) 的生长,昆虫食草和叶状特征.
- 研究种群多样性 (单一种植,原产地混合,物种混合) 对草食和叶子特征的影响.
- 确定树木的外观和光线可用性是否影响叶子特征和草食,以及立体多样性是否影响这些因素.
主要方法:
- 利用气候匹配实验,操纵树木的气候来源和树种多样性.
- 对比当地英语和意大利来源的树 (Quercus robur).
- 评估了生长,昆虫食草,叶子特征,树的外观和光线的可用性.
主要成果:
- 意大利树遭受的除草动物损害比当地英国树更大,不管种群多样性如何.
- 意大利树上的昆虫食草率在更明显的树上更高.
- 叶子特征的变化与光照度的差异密切相关;水解 tannin 度是草食的不良预测因素.
结论:
- 通过转移的辅助迁移可能会增加食草动物的损害,特别是对于某些来源.
- 种群多样性在减轻气候相匹配树木的过多草食性树木的作用需要进一步调查.
- 光的可用性是混合种群中叶子特征变异和草食的关键驱动因素.
相关概念视频
02:39Predator-Prey Interactions
16.1K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
16.1K
00:53Migration
7.9K
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
7.9K
01:50Threats to Biodiversity
22.1K
There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
22.1K
01:57Adaptations that Reduce Water Loss
25.1K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.1K
01:21Frequency-dependent Selection
21.8K
When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
21.8K
00:58Symbiosis
27.4K
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
27.4K