関連する実験動画
Updated: Jul 12, 2026

07:59
Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities
Published on: January 6, 2023
ファネロゾイク期のシェルフコミュニティの進化におけるオンショア・オフショアパターン
まとめ
海洋生態系における生態学的革新は,海岸付近から始まり,外へと広がり,古いコミュニティの代わりとなる. このパターンは,オフショア種のターンオーバーと進化のダイナミクスに関する仮定に異議を唱えます.
科学分野:
- パレオントロジー・パレオントロジー
- 海洋生態学 海洋生態学とは
- 進化生物学の進化生物学について
背景:
- 海洋ベンシックコミュニティは,地質的な時間における複雑な進化パターンを示しています.
- 生態学的イノベーションの空間的動態を理解することは,進化論の研究にとって極めて重要です.
研究 の 目的:
- 海洋生態系における主要な生態学的革新の空間的起源と拡大を調査する.
- オンショア・イノベーション・オフショア・アルカイック進化パターンを分析する.
主な方法:
- カンブリア紀・オルドヴィチア紀の海洋 Benthic コミュニティのクラスター分析.
- クレータ紀後期におけるシェルフファウナのコミュニティ・トロフィク分析.
主要な成果:
- 主要な生態学的革新は,最初に海岸付近の環境で出現した.
- これらのイノベーションは,その後,架上に広がり,古いコミュニティタイプを置き換えました.
- オンショア・イノベーション・オフショア・アルカイックなパターンが観察され,オフショアでの売上高の増加の期待とは対照的に.
結論:
- 観察された進化のパターンは,近岸環境とオフショア環境の間の異なる絶滅または発生率を示唆しています.
- 近岸環境は,新しい生態学的な関連と進化の新しさの出現のための重要なセンターとして機能する可能性があります.
関連する概念動画
Diversity of Protists III
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
Marine Microbial Ecology
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
Deep Sea Microbial Ecology
The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches extending beyond...
What is Evolutionary History?
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.Phylogenetic trees illustrate the evolutionary relationships among these organisms. Scientists infer organisms’ common ancestry by evaluating shared morphological and genetic characteristics. Together, the fossil...
Diversity of Protists II
Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
Primary Production
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.

