Climate, site conditions, and stand characteristics influence maximum size-density relationships in Korean red pine (Pinus densiflora) and Mongolian oak (Quercus mongolica) stands, South Korea

Since successful reforestation after the 1970s, Korean red pine (Pinus densiflora) forests have become the most important coniferous forests in Korea. However, the scarcity of evidence for biodiversity responses hinders understanding of the conservation value of Korean red pine forests. This study was conducted to explore the patterns of carabid beetle diversity and assemblage structures between broad-leaved deciduous forests and P. densiflora forests in the temperate region of central Korea. Carabid beetles were sampled by pitfall trapping from 2013 to 2014. A total of 66 species were identified from 9541 carabid beetles. Species richness in broad-leaved deciduous forests was significantly higher than that in pine forests. In addition, the species composition of carabid beetles in broad-leaved deciduous forests differed from that of P. densiflora forests. More endemic, brachypterous, forest specialists, and carnivorous species were distributed in broad-leaved deciduous forests than in P. densiflora forests. Consequently, carabid beetle assemblages in central Korea are distinctively divided by forest type based on ecological and biological traits (e.g., endemisim, habitat types, wing forms, and feeding guilds). However, possible variation of the response of beetle communities to the growth of P. densiflora forests needs to be considered for forest management based on biodiversity conservation in temperate regions, because conifer plantations in this study are still young, i.e., approximately 30–40-years old.

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Initial responses of vegetation regeneration after strip clear cutting in secondary Korean red pine (Pinus densiflora) forest in Samcheok, Gangwon-do, South Korea1a

Korean Journal of Environment and Ecology ◽

10.13047/kjee.2015.29.5.785 ◽

2015 ◽

Vol 29 (5) ◽

pp. 785-790 ◽

Cited By ~ 2

Author(s):

Se-Yeong Jeong ◽

◽

Yong-Chan Cho ◽

Bong-Kyu Byun ◽

Hye-Jin Kim ◽

...

Keyword(s):

Pinus Densiflora ◽

Red Pine ◽

Clear Cutting ◽

Korean Red Pine ◽

Pinus Densiflora Forest ◽

Vegetation Regeneration

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Ecological Characteristics of Korean Red Pine (Pinus densiflora S. et Z.) Forest on Mt. Nam as a Long Term Ecological Research (LTER) Site

Journal of Ecology and Field Biology ◽

10.5141/jefb.2006.29.6.593 ◽

2006 ◽

Vol 29 (6) ◽

pp. 593-602 ◽

Cited By ~ 6

Keyword(s):

Pinus Densiflora ◽

Red Pine ◽

Ecological Research ◽

Ecological Characteristics ◽

Korean Red Pine ◽

Long Term Ecological Research

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Antihypertensive Effects of Polyphenolic Extract from Korean Red Pine (Pinus densiflora Sieb. et Zucc.) Bark in Spontaneously Hypertensive Rats

Antioxidants ◽

10.3390/antiox9040333 ◽

2020 ◽

Vol 9 (4) ◽

pp. 333

Author(s):

Kwan Joong Kim ◽

Eun-Sang Hwang ◽

Min-Jeong Kim ◽

Ji-Ho Park ◽

Dae-Ok Kim

Keyword(s):

Angiotensin Ii ◽

Pinus Densiflora ◽

Tap Water ◽

Red Pine ◽

Bark Extract ◽

Control Group ◽

Spontaneously Hypertensive ◽

Korean Red Pine ◽

Mda Content ◽

Ace Activity

Korean red pine (Pinus densiflora Sieb. et Zucc.) bark is a by-product of the wood industry and contains a high level of antioxidative phenolics including flavonoids, which have a variety of beneficial health effects. This study aimed to investigate the antihypertensive effects of P. densiflora bark extract (Korean red pine bark extract; KRPBE) in spontaneously hypertensive rats (SHRs). A group of Wistar-Kyoto rats as a normotensive group was orally fed tap water. Four groups of SHRs were orally fed tap water, captopril (a positive control), 50 mg/kg/day of KRPBE, and 150 mg/kg/day of KRPBE, respectively. Blood pressure of rats was measured once every week for seven weeks of oral administration. After seven weeks, the lungs, kidneys, and serum were collected from rats, then angiotensin-converting enzyme (ACE) activity, angiotensin II content, and malondialdehyde (MDA) content were determined. Blood pressure of the captopril- and KRPBE-treated groups was significantly lower than that of the SHR control group. The ACE activity, angiotensin II content, and MDA content significantly decreased in the captopril- and KRPBE-treated groups than those in the SHR control group. High-performance liquid chromatography analysis revealed six phenolics in KRPBE: protocatechuic acid, procyanidin B1, catechin, caffeic acid, vanillin, and taxifolin. KRPBE, which contains plenty of antioxidative phenolics, has antihypertensive effects partly due to reduction of ACE activity and angiotensin II content, and its antioxidative effect.

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