Knowing your limits: Patterns and drivers of nutrient limitation and nutrient–chlorophyll relationships in US lakes

IF 5.1 2区 地球科学 Q1 LIMNOLOGY
Ian M. McCullough, Xinyu Sun, Patrick J. Hanly, Patricia A. Soranno
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引用次数: 0

Abstract

Although understanding nutrient limitation of primary productivity in lakes is among the oldest research priorities in limnology, there have been few broad-scale studies of the characteristics of phosphorus (P)-, nitrogen (N)-, and co-limited lakes and their environmental context. By analyzing 3342 US lakes with concurrent P, N, and chlorophyll a (Chl a) samples, we showed that US lakes are predominantly co-limited (43%) or P-limited (41%). Majorities of lakes were P-limited in the Northeast, Upper Midwest, and Southeast, and co-limitation was most prevalent in the interior and western United States. N-limitation (16%) was more prevalent than P-limitation in the Great Basin and Central Plains. Nutrient limitation was related to lake, watershed, and regional variables, including Chl a concentration, watershed soil, and wet nitrate deposition. N and P concentrations interactively affected nutrient–chlorophyll relationships, which differed by nutrient limitation. Our study demonstrates the value of considering P, N, and environmental context in nutrient limitation and nutrient–chlorophyll relationships.

Abstract Image

了解你的极限:美国湖泊养分限制和养分-叶绿素关系的模式和驱动因素
尽管了解湖泊初级生产力的养分限制是湖泊学中最古老的研究重点之一,但对磷(P)-、氮(N)-和共限制湖泊的特征及其环境背景的大范围研究却很少。通过分析美国 3342 个同时采集磷、氮和叶绿素 a(Chl a)样本的湖泊,我们发现美国的湖泊主要是共限湖(43%)或磷限湖(41%)。东北部、上中西部和东南部的大多数湖泊都存在磷限制,而共同限制在美国内陆和西部最为普遍。在大盆地和中部平原,氮限制(16%)比磷限制更普遍。养分限制与湖泊、流域和区域变量有关,包括 Chl a 浓度、流域土壤和湿硝酸盐沉积。氮和磷的浓度相互作用,影响着养分与叶绿素的关系,这种关系因养分限制而异。我们的研究表明,在营养盐限制和营养盐-叶绿素关系中,考虑磷、氮和环境背景很有价值。
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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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