Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR027296 |
Differential responses of maximum versus median chlorophyll‐a to air temperature and nutrient loads in an oligotrophic lake over 31 years | |
Nicole K. Ward; Bethel G. Steele; Kathleen C. Weathers; Kathryn L. Cottingham; Holly A. Ewing; Paul C. Hanson; Cayelan C. Carey | |
2020-05-28 | |
发表期刊 | Water Resources Research |
出版年 | 2020 |
英文摘要 | Globally, phytoplankton abundance is increasing in lakes as a result of climate change and land‐use change. The relative importance of climate and land‐use drivers has been examined primarily for mesotrophic and eutrophic lakes. However, oligotrophic lakes show different sensitivity to climate and land‐use drivers than mesotrophic and eutrophic lakes, necessitating further exploration of the relative contribution of the two drivers of change to increased phytoplankton abundance. Here, we investigated how air temperature (a driver related to climate change) and nutrient load (a driver related to land‐use and climate change) interact to alter water quality in oligotrophic Lake Sunapee, New Hampshire, USA. We used long‐term data and the one‐dimensional hydrodynamic General Lake Model (GLM) coupled with Aquatic EcoDyanmics (AED) modules to simulate water quality. Over the 31‐year simulation, summer median chlorophyll‐a concentration was positively associated with summer air temperature, whereas annual maximum chlorophyll‐a concentration was positively associated with the previous three years of external phosphorus load. Scenario testing demonstrated a 2°C increase in air temperature significantly increased summer median chlorophyll‐a concentration, but not annual maximum chlorophyll‐a concentration. For both maximum and median chlorophyll‐a concentration, doubling external nutrient loads of total nitrogen and total phosphorus at the same time, or doubling phosphorus alone, resulted in a significant increase. This study highlights the importance of aligning lake measurements with the ecosystem metrics of interest, as maximum chlorophyll‐a concentration may be more uniquely sensitive to nutrient load, and that typical summer chlorophyll‐a concentration may increase due to warming alone. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/271683 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Nicole K. Ward,Bethel G. Steele,Kathleen C. Weathers,等. Differential responses of maximum versus median chlorophyll‐a to air temperature and nutrient loads in an oligotrophic lake over 31 years[J]. Water Resources Research,2020. |
APA | Nicole K. Ward.,Bethel G. Steele.,Kathleen C. Weathers.,Kathryn L. Cottingham.,Holly A. Ewing.,...&Cayelan C. Carey.(2020).Differential responses of maximum versus median chlorophyll‐a to air temperature and nutrient loads in an oligotrophic lake over 31 years.Water Resources Research. |
MLA | Nicole K. Ward,et al."Differential responses of maximum versus median chlorophyll‐a to air temperature and nutrient loads in an oligotrophic lake over 31 years".Water Resources Research (2020). |
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