• Title/Summary/Keyword: Ecology

Search Result 14,091, Processing Time 0.031 seconds

A Study on the Residual Microplastics in Freshwater and Fishes in the Geum River Watershed (금강수계 담수와 어류체내 잔류미세플라스틱 연구)

  • Kim, Nam-Shin;Yoon, Ju-Duk;Lee, Seung-Eun;Park, Young-Joon;Woo, Seung-Hyun
    • Korean Journal of Ecology and Environment
    • /
    • v.52 no.1
    • /
    • pp.28-39
    • /
    • 2019
  • This study was conducted to elucidate microplastics detection of freshwater ecosystems in Geum river. Samples are collected at 6 points in freshwater, 5 points in fishes. Freshwater was sampled 100 L per each points and fish species were Opsariichthys uncirostris amurensis, Hemibarbus labeo, Pseudogobio esocinus, Zacco platypus, Micropterus salmoides and Cyprinus carpio. FTIR analyis was adopted to identify microplastic types. Extracted microplastics were PES (polyester), PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate), PVC(Polyvinyl chloride) in freshwater, and PES, PE, PP, PET, PVC in fishes. Our results were expected to be used basic research information for further study in microplastics of freshwater ecosystems.

Genetic Structure of the Neglected Decomposer, Ptecticus tenebrifer, with an Introduced Decomposer, Hermetia illucens

  • Jeong, Gilsang;Choi, Hansu;Kang, Hyejin;Jin, Seon Deok
    • Proceedings of the National Institute of Ecology of the Republic of Korea
    • /
    • v.2 no.2
    • /
    • pp.96-100
    • /
    • 2021
  • The era of mass production of agricultural and dairy systems inevitably causes a huge amount of biowastes during their processes. Modern consumption patterns of the general public also contribute to biowaste formation. Thus, processing biowastes has attracted much attention. The introduced black soldier fly (BSF) (Hermetia illucens) is considered as one of environmentally friendly management options for solving biowaste issues. However, an indigenous species, Ptecticus tenebrifer, is also a powerful decomposer that has been largely neglected. This species can be easily found on biowastes such as manure dump, agricultural wastes, and human food wastes. It can be also easily found in the field. It is even attracted to a food trap. To the best of our knowledge, this is the first ecological study on this species.

First Report on Plum Pocket Caused by Taphrina deformans in South Korea

  • Oh, Nam Kwon;Hassan, Oliul;Chang, Taehyun
    • Mycobiology
    • /
    • v.48 no.6
    • /
    • pp.522-527
    • /
    • 2020
  • Plum pocket caused by the dimorphic ascomycetous fungi, Taphrina spp., results in unsightly malformations and crop loss. In 2016, Japanese plums (Prunus salicina Lindl.) with plum pocket symptoms were found in Gimcheon. Three isolates were collected from symptomatic P. salicina fruits and identified as Taphrina deformans based on morphological characteristics and molecular sequence analysis of including internal transcribed space (ITS) and the mitochondrial small ribosomal subunit (SSU) regions of the three isolates. Pathogenicity test on plum fruits confirmed that, the present T. deformans isolates are causal agent of plum pocket. To the best of our knowledge, this is the first report of plum pocket caused by T. deformans in South Korea.