侵入性宏藻繁荣和衰退的复杂驱动因素在夏威夷的Kane'ohe湾
Morgan Winston1, Kimberly Fuller2, Brian J Neilson2
1School of Geographical Sciences and Urban Planning, Arizona State University, Tempe, AZ 85281, USA; Center for Global Discovery and Conservation Science, Arizona State University, Hilo, HI, USA 96720.
Marine pollution bulletin
|November 11, 2023
概括
侵袭性大藻类 (Eucheuma和Kappaphycus) 在卡内显著下降.
科学领域:
- 海洋生物学 海洋生物学
- 生态生态学 生态生态学
- 侵袭性物种管理 侵袭性物种管理
背景情况:
- 侵袭性大藻 Eucheuma sp. 的情况 和Kappaphycus spp. 这种植物. (E/K) 四十年来主导着卡尼奥赫湾的珊瑚礁,覆盖面积高达74公,厚度达到3米.
- 由于E/K扩散对生态的重大影响,实施了密集的管理行动.
- 2013年开始,在经营和未经营地区,E/K覆盖率显著下降.
研究的目的:
- 调查Kane'ohe湾侵袭性E/K衰退的程度和时间.
- 除了直接管理之外,评估可能导致E/K减少的环境和生态因素.
- 了解E/K"繁荣与衰退"周期背后的机制,并评估珊瑚礁的弹性.
主要方法:
- 生态调查以追踪2013年至2017年的E/K覆盖面和下降时间.
- 统计分析以将E/K覆盖与环境变量 (海面温度,风,降雨) 和生态因素 (食草动物生物质,珊瑚覆盖) 相关联.
- 非线性建模以探索E/K丰富度与环境/生态驱动因素之间的复杂关系.
主要成果:
- 通过2017年,E/K覆盖率继续下降,在卡内奥赫湾仍然稀疏.
- 增加的草食生物量与E/K覆盖有显著的负相关性.
- 在E/K覆盖和珊瑚覆盖,海面温度,风和降雨之间确定了显著的非线性关系.
结论:
- 草食在调节入侵的E/K种群中起着至关重要的作用,有助于它们的衰退.
- 环境因素与生态压力相互作用,影响入侵物种的动态.
- 这项研究强调了Kane'ohe湾珊瑚礁在侵袭性大藻减少后的潜在弹性.
更多相关视频
05:04Author Spotlight: Understanding Riverine Nitrogen Impacts and Primary Productivity for Effective Nutrient Management
Published on: July 14, 2023
428
05:58Author Spotlight: Advancing Coral Culture - Creating a Semi-Quantitatively Controlled Microenvironment System to Counter Current Limitations
Published on: July 21, 2023
2.0K
相关概念视频
Other Algae
30
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
30
Green Algae
26
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
26
Primary Production
23.6K
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.
23.6K
Keystone Species
21.7K
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...
21.7K
Red Algae
38
Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
38
Threats to Biodiversity
22.4K
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...
22.4K
