Herbicide Impact on Seagrass Communities

Devault, A. Damien; Pascaline, Hélène

doi:10.5772/55973

Cited by 3 publications

(3 citation statements)

References 103 publications

(124 reference statements)

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“…Anthropogenic activities are the main cause of the unpredictable destruction of seagrass globally (Potouroglou et al, 2017;Unsworth et al, 2019). Globally, conservation and restoration efforts, such as seeding and planting, have not kept pace with the loss of seagrass beds (Damien & Pascaline, 2013). The risks identified at each study site were categorized according to the activities that were most likely to disrupt the condition and cover of seagrass (Table 4).…”

Section: Seagrass Ecosystem Condition Assessmentmentioning

confidence: 99%

Health Status of Seagrass Meadows Around the Special Economic Zone (SEZ), West Likupang, North Sulawesi

Satriani,

Imran,

Kurniawan

et al. 2024

jppipa, pendidikan ipa, fisika, biologi, kimia

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Seagrass ecosystems offer valuable ecosystem services but are highly vulnerable to physical damage caused by human activities and rapid environmental change. Currently, there is very limited information available on monitoring and reporting the health of seagrass beds in Indonesian waters. This study aims to assess the species composition, density, diversity index, percentage of seagrass cover, health condition, and identification of threats to seagrass ecosystems around the West Likupang Special Economic Zone (SEZ), North Sulawesi. The method used was a seagrass watch with line transects and quadrant-shaped frames measuring 50x50 cm2. Transect lines were established through the seagrass ecosystem area at 50 m. There were three line transects at each station 25 m apart. Quadrant frame measuring 50x50 cm2. West Likupang has eight seagrass species including C. rotundata, E. acoroides, H. pinifolia, H. uninervis, H. ovalis, O. serrulata, S. isoetifolium, dan T. hemprichii. The health status of the seagrass is currently healthy, with a dense percentage of coverage. The identification of potential risks from anthropogenic activities such as the household disposal of waste at sea, gleaning, the use of boat anchors and propellers, and the construction of infrastructure in coastal areas, such as hotels and harbonurs, pose significant threats.

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Section: Seagrass Ecosystem Condition Assessmentmentioning

confidence: 99%

Health Status of Seagrass Meadows Around the Special Economic Zone (SEZ), West Likupang, North Sulawesi

Satriani,

Imran,

Kurniawan

et al. 2024

jppipa, pendidikan ipa, fisika, biologi, kimia

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“…Seagrasses are exposed to herbicides and their degradation products through both the surface water (leaves) and the sediment (roots). Although a few studies have reported the impact of herbicides on seagrasses (see Devault and Pascaline (2013) for an overview), most studies reported impact on plant physiological endpoints (photosynthesis) only and not on overall growth. Seagrass vulnerability to short exposures of high concentrations of herbicides has been observed (Macinnis-Ng and Ralph 2004), and the combined effects of high temperatures and the herbicide atrazine were more harmful to seagrass compared to a single pressure (Gao et al 2017).…”

Section: Risk Assessment Of Sediment-associated Herbicides For Aquatimentioning

confidence: 99%

Herbicide Exposure and Toxicity to Aquatic Primary Producers

Vonk

Kraak

2020

Reviews of Environmental Contamination and Toxicology

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The aim of the present review was to give an overview of the current state of science concerning herbicide exposure and toxicity to aquatic primary producers. To this end we assessed the open literature, revealing the widespread presence of (mixtures of) herbicides, inevitably leading to the exposure of non-target primary producers. Yet, herbicide concentrations show strong temporal and spatial variations. Concerning herbicide toxicity, it was concluded that the most sensitive as well as the least sensitive species differed per herbicide and that the observed effect concentrations for some herbicides were rather independent from the exposure time. More extensive ecotoxicity testing is required, especially considering macrophytes and marine herbicide toxicity. Hence, it was concluded that the largest knowledge gap concerns the effects of sediment-associated herbicides on primary producers in the marine/estuarine environment. Generally, there is no actual risk of waterborne herbicides to aquatic primary producers. Still, median concentrations of atrazine and especially of diuron measured in China, the USA and Europe represented moderate risks for primary producers. Maximum concentrations due to misuse and accidents may even cause the exceedance of almost 60% of the effect concentrations plotted in SSDs. Using bioassays to determine the effect of contaminated water and sediment and to identify the herbicides of concern is a promising addition to chemical analysis, especially for the photosynthesis-inhibiting herbicides using photosynthesis as endpoint in the bioassays. This review concluded that to come to a reliable herbicide hazard and risk assessment, an extensive catch-up must be made concerning macrophytes, the marine environment and especially sediment as overlooked and understudied environmental compartments.

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“…Glyphosate has been found in streams after its application for agricultural, urban, and forestry purposes around the word (Giesy et al, 2000a;Duke and Powles, 2008). In shallow waters, pesticide residues can expose remarkable biocenosis, particularly in tropical contexts due to the conserved biodiversity observed in these regions compared to temperate area exposed for decades to pollution from developed countrieś activities (Devault and Pascaline, 2013). Thiel et al (2013) noted that an important fraction of the anthropogenic marine debris found in coastal waters with large rivers originates from land-based activities, which can occur far from the coast.…”

Section: Introductionmentioning

confidence: 99%