Biomanipulation 生物操縱與湖泊修復 . fishbone cactus or zig zag cactus,

Biomanipulation  生物操縱與湖泊修復 . fishbone cactus or zig zag cactus,

人工智慧概述

生物操縱與湖泊修復 - 生物操縱是一種湖泊修復技術，它採用自上而下的生物管理方法——主要透過調整魚類群落——來改善富營養化生態系統的水質。其作用機制是透過減少以浮游生物為食/以底棲生物為食的魚類，從而增加浮游動物的數量，而浮游動物又會捕食藻類，進而提高水體透明度並促進大型水生植物的生長。

ScienceDirect.com

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生物操縱的關鍵方面

機制：其核心過程涉及食物網管理，例如移除以浮游動物為食的魚類或添加以其他魚類為食的魚類（食魚性魚類）。

目標生態系：生物操縱在淺水、富營養化湖泊中非常有效，因為在這些湖泊中，藻類過度繁殖會導致水體混濁度升高。

策略：方法包括減少以浮游生物為食/以底棲生物為食的魚類（例如，鯽魚、鱂魚），投放以魚類為食的魚類（例如，梭魚、梭鱸），有時還會同時減少營養負荷。

目標：將湖泊從藻類主導的渾濁狀態轉變為以沈水植物主導的清澈狀態。

永續性：雖然可以迅速改善水質，但長期成功通常需要持續管理魚類族群和營養水平。

ScienceDirect.com

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生物操縱的類型

傳統（由上而下）：著重於減少以浮游動物為食的魚類，以增加食草動物（例如，水蚤）的密度。

非傳統方法（自下而上/直接法）：包括引進濾食性魚類（例如鰱魚）直接攝食藻類和藍藻，或控制底棲魚類以減少營養物質的再懸浮。

the-innovation.org

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挑戰

效果可能因湖泊大小和食物網結構而異。

氣候變暖可能會降低效果，削弱修復狀態的穩定性。

如果不同時控制營養負荷，這種方法通常被認為是一種臨時解決方案。

ScienceDirect.com

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有關生物操縱技術的詳細概述，請參閱ScienceDirect上的概述和維基百科的生物操縱頁面。 ResearchGate上的這篇出版品也對此方法作為一種修復工具進行了詳細的評論。

AI Overview

Biomanipulation is a lake restoration technique that uses top-down biological management—primarily adjusting fish communities—to improve water quality in eutrophic ecosystems. It acts by reducing planktivorous/benthivorous fish to boost zooplankton, which then graze on algae, increasing water clarity and encouraging macrophyte growth. 

Key Aspects of Biomanipulation

• Mechanism: The core process involves food web management, such as removing fish that eat zooplankton or adding fish that eat other fish (piscivores).
• Targeted Ecosystems: It is highly effective in shallow, eutrophic lakes where excessive algae cause high turbidity.
• Strategies: Methods include reducing planktivorous/benthivorous fish (e.g., roach, bream), stocking piscivorous fish (e.g., pike, pike-perch), and sometimes reducing nutrient loading simultaneously.
• Goal: To move the lake from an algal-dominated, turbid state to a submerged macrophyte-dominated, clear-water state.
• Sustainability: While it can cause rapid improvement in water quality, long-term success often requires ongoing management of fish populations and nutrient levels. 

Types of Biomanipulation

• Traditional (Top-down): Focuses on reduction of zooplanktivorous fish to increase grazer (e.g., Daphnia) density.
• Non-traditional (Bottom-up/Direct): Involves introducing filter-feeding fish (e.g., silver carp) to directly consume algae and cyanobacteria, or controlling benthivorous fish to reduce nutrient resuspension. 

Challenges

• Effectiveness can be variable and dependent on the lake's size and food web structure.
• Climate warming may hinder effectiveness, reducing the stability of the restored state.
• It is often considered a temporary fix if nutrient loading is not also managed. 

For a detailed overview of biomanipulation techniques, see this ScienceDirect overview and Wikipedia's page on biomanipulation. A detailed review of the method as a restoration tool is also available in this ResearchGate publication. 

Wikipedia
https://en.wikipedia.org › wiki › Disocactus_anguliger






Disocactus anguliger (syn. Epiphyllum anguliger), commonly known as the fishbone cactus or zig zag cactus, is a cactus species native to Mexico.


張錯

又見魚骨，又見令箭

Fish bone cactus

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