草的食模式不同地影响北方混合草原的草地物种覆盖面
1Agricultural Research Service, Pest Management Research Unit, Northern Plains Agricultural Research Laboratory, USDA, Sidney, MT, USA.
Journal of economic entomology
|December 12, 2025
概括
七年来持续的草草食量显著减少了混合草草草原的蓝色草皮覆盖. 这凸显了草地食昆虫对草地植物组成的影响.
科学领域:
- 生态生态学 生态生态学
- 昆虫学 昆虫学是一门学科.
- 植物科学 植物科学
背景情况:
- 草原生态系统面临来自各种来源的草食压力.
- 持续的昆虫草食对植物组成的长期影响还没有得到充分的研究.
- 的食方式可以影响它们的生态影响.
研究的目的:
- 调查持续草草食对混合草草草原中占主导地位的草种的长期影响.
- 为了比较不同养方式 (草养与混合养) 的虫对植物覆盖的影响.
- 为了评估西方小麦草和蓝色格拉玛在七年内对草食动物的抵抗力.
主要方法:
- 一个为期7年的操纵实验是在北方的混合草原草原进行的.
- 两种虫物种,Ageneotettix deorum (吃草的动物) 和Melanoplus sanguinipes (混合的动物),被用来应用食草治疗.
- 西方小麦草和蓝色草的基底覆盖被测量与草食动物治疗和控制 (没有草食动物) 相比.
主要成果:
- 与对照图片相比,蓝色草基底覆盖在草食草A. deorum的图片中大约低50%,与对照图片相比.
- 与对照组相比,混合食的草M. sanguinipes没有显著减少蓝色覆盖.
- A. deorum 显示了更高频率的破坏蓝色格拉玛叶片,这表明食偏好影响了结果.
结论:
- 吃草的草持续的草食可以显著减少关键草原物种的覆盖面,如蓝色草.
- 的食行为和植物偏好在确定对植物组成的影响方面发挥着至关重要的作用.
- 蓝色虫对草食虫的抵抗力低于对牛放牧的抵抗力,这表明昆虫草食在牧场动态中的重要性.
相关概念视频
01:46Types of Selection
43.7K
Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
43.7K
00:48Optimal Foraging
13.4K
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
13.4K
02:40Epiphytes, Parasites, and Carnivores
16.5K
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
16.5K
02:39Predator-Prey Interactions
21.0K
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.
21.0K
02:02Ecological Niches
25.9K
All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
25.9K
02:11The Roles of Bacteria and Fungi in Plant Nutrition
46.5K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
46.5K