Edward Laws

Professor Louisiana State University

  • Baton Rouge LA

Dr. Laws’s research focuses on phytoplankton ecology, nutrient and carbon cycling.

Contact

Louisiana State University

View more experts managed by Louisiana State University

Areas of Expertise

Phytoplankton Ecology
Water Pollution
Climate Change

Research Focus

Phytoplankton Ecology & Nutrient Cycling

Dr. Laws’s research focuses on phytoplankton ecology, nutrient and carbon cycling, and aquatic pollution in coastal and open-ocean systems. He combines field and shipboard sampling, stable-isotope and trace-metal analyses, and ecosystem modeling to predict primary production, gauge climate impacts, and guide water-quality and coastal-restoration policy.

Education

Harvard University

B.A.

Chemistry

1967

Harvard University

Ph.D.

Chemical Physics

1972

Accomplishments

Distinguished Research Master,

2025

Articles

Coupling between bacterial phylogenetic diversity and heterotrophic productivity in a coastal ecosystem affected by estuarine plumes

ISME Communications

2025

Understanding the diversity-productivity relationship (DPR) is crucial for elucidating the ecological functions of marine bacterioplankton. However, studies have often focused on species diversity, neglecting phylogenetic diversity, which may offer deeper insights into the complex ecological processes shaping DPR in natural systems. This study addressed this gap by exploring the role of phylogenetic diversity in bacterioplankton productivity in the northern South China Sea, a coastal ecosystem influenced by estuarine plumes. We aimed to disentangle the mechanisms driving DPR and investigate how estuarine plumes modulate these processes. Our results show that the substantial enhancement of phytoplankton production by the Pearl River plume increased bacterial production, abundance, and cell-specific production. From a metacommunity perspective, phylogenetic diversity, rather than species diversity, significantly enhanced productivity. The plume reduced positive species interactions and complementarity but amplified the selection effect, where increased phylogenetic diversity raised the likelihood of including highly productive species.

View more

Phago‐mixotrophic activity within nanophytoplankton community in a subtropical marginal sea

Limnology and Oceanography

2025

An increasing number of studies have documented the ecological importance of phago‐mixotrophy within phytoplankton communities, especially in open ocean environments. We know less about the distribution and function of such phytoplankton within marginal seas. This study was an investigation of phago‐mixotrophy among nanoeukaryotic phytoplankton along a shelf‐to‐off‐shelf transect in the South China Sea with a focus on prasinophytes (Mamiellophyceae) and haptophytes (Prymnesiophyceae). We measured group‐specific grazing rates using tyramide signal amplified fluorescent in situ hybridization and assessed community‐level inorganic nutrient (including carbon and nitrogen) uptake rates to demonstrate the heterotrophic and autotrophic growth capabilities of the phytoplankton. We also used correlation analysis, principal component analysis, generalized additive models, and structural equation modeling to evaluate the interrelationship between phago‐mixotrophic activity and key environmental parameters, including abiotic factors (e.g., temperature, salinity, nutrients) and biotic factors (e.g., bacterial abundance).

View more

Climate-driven connectivity loss impedes species adaptation to warming in the deep ocean

Nature Climate Change

2025

Marine life are expected to have fewer thermal barriers restricting their movement to adjacent habitats than terrestrial species do. However, it remains unknown how this warming-induced connectivity loss varies in different ocean strata, limiting the predictability of warming impacts on biodiversity in the whole ocean. Here, we developed a climate connectivity framework across seascape strata under different climate change scenarios, which combines thermal gradient, human impacts and species tolerance thresholds. We show that warming may lead to connectivity loss, with its magnitude increasing with depth. Connectivity loss is projected to increase rapidly in 2050, particularly in deep strata, and may impair the movement capacity of deep-sea phyla in adapting to warming. With the compression of habitat ranges, over one-quarter of deep-sea species inhabit areas that may experience disrupted connectivity, threatening the maintenance of deep-sea biodiversity. Our results highlight the challenges that climate change poses to biodiversity conservation through disruption of deep-sea connectivity.

View more

Show All +