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関連する概念動画

What is Biodiversity?01:19

What is Biodiversity?

Biodiversity describes the variety of living things at multiple organizational levels: genetic, species and ecosystem diversity. Species diversity includes all branches of the evolutionary tree from single-celled prokaryotic organisms, bacteria, and archaea, to the eukaryotic kingdoms: plants; animals; fungi; and protists. To date, there have been about 1.75 million species identified, and new species are discovered every week.
Keystone Species01:39

Keystone Species

Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a pivotal role in the...
Ecological Niches02:02

Ecological Niches

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.Multiple species cannot occupy the exact same niche within their habitat. If the niches of two or more species overlap to a large extent, the competitive exclusion principle dictates that one species will outcompete the other, forcing it to...
Ecological Disturbance02:26

Ecological Disturbance

An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.Ecological disturbances can be caused by an event as small as the trampling of underbrush to an incident as wide-ranging as a forest...
Symbiosis00:58

Symbiosis

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...
Introduction to Microbial Ecology01:28

Introduction to Microbial Ecology

Microbial ecology examines the complex web of interactions and diversity among microorganisms within various ecosystems. This field seeks to understand how microbial populations adapt to and influence their environments and how these interactions shape broader ecological processes. Microbes are integral to ecosystem function, participating in nutrient cycling, energy flow, and the maintenance of environmental homeostasis.An ecosystem represents a dynamic interaction between living organisms...

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関連する実験動画

Updated: Jul 12, 2026

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
10:23

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

Published on: July 11, 2025

エコロジー:何時,多くの種が重要になるのか?

J Kaiser

    Science (New York, N.Y.)
    |September 5, 2007
    PubMed
    まとめ

    実験用プラントの芝生種が増えれば,しばしば生産性が向上する. しかし,科学者は,これが生物多様性が生態系の健康に不可欠であることを証明するかどうかについて議論しています.

    科学分野:

    • エコロジー エコロジー エコロジー
    • 環境科学 環境科学

    背景:

    • 実験的証拠は,草原のコミュニティにおける種の豊かさと生態系の生産性との間の正の相関を示唆しています.
    • この相関関係が生態系の健康を維持する上で生物多様性の重要な役割に及ぼす影響について,科学的な議論がある.

    研究 の 目的:

    • 実験的な草原環境における植物種の多様性と生態系の生産性との関係を調査する.
    • さまざまなプロットで観察された生産性の向上が,生態系の機能にとって生物多様性が不可欠であることを意味するかどうかに関する進行中の科学的な議論に取り組む.

    主な方法:

    • 種多様性を操作し観察するために草の実験用プロットを活用しました.
    • 生物多様性の異なるレベルでの生態系の生産性を測定する.

    主要な成果:

    • 種多様性が高い実験用プロットは,より高い生産性を示した.
    • 観察された生産性の上昇は,異なる実験セットアップで一貫していました.

    結論:

    • 草原における生物多様性の高まりは生産性の向上と結びついているが,生態系の全体的な健康にとって生物多様性の重要性は科学的な議論の対象となっている.
    • 生物多様性と重要な生態系機能の間の因果関係を明確に確立するには,さらなる研究が必要である.

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