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Impacts of invasive Iris pseudacorus L.(yellow flag) establishing in an abandoned urban pond on native semi-wetland vegetation

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Journal of Integrative Agriculture 2018年第8期17卷 1881-1887页

作者： daisuke hayasaka Shingo Fujiwara Taizo Uchida Graduate School of Agriculture KINDAI University Faculty of Engineering Kyushu Sangyo University

Iris pseudacorus L., intentionally introduced in Japan as an ornamental plant and to improve aquatic environments, has been declared a noxious species in the Invasive Alien Species Act of Japan due to the suspected high ecological risks to the local species and ecosystems. Although prompt responses to I. pseudacorus have been sought to conserve local biodiversity, knowledge about its invasiveness is lacking. Here, we report the relationship between the establishment of I. pseudacorus and floristic changes in semi-wetland vegetation of an abandoned urban pond(Aoike), Nara City, Nara Prepecture, Japan. In total, 64 vascular plants were recorded in the pond, of which 50 were native species, seven were naturalized non-native, and seven were invasive species. On the other hand, most of these vascular plants(42 species) were grassland species and only several aquatic plants(10 species) were found in this study pond. The number of vascular plant species decreased significantly at quadrats with a coverage of I. pseudacorus above 50%. In addition, tendencies of lower number of native species and concomitant higher number of invasive species were found with increasing coverage of I. pseudacorus. From these results, we suggest that it is important to preferentially manage sites where the coverage of I. pseudacorus is above 50%, in order to preserve the local biodiversity. Additionally, as recommended in the literature, it is essential that the cut reproductive organs are kept submerged under deep water for an effective control of I. pseudacorus.

关键词： biodiversity conservation biological invasions ecological impacts exotic species hydrophytes species traits

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Feasibility of gastric endoscopic submucosal dissection with continuous low-dose aspirin for patients receiving dual antiplatelet therapy

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World Journal of Gastroenterology 2019年第4期25卷 457-467页

作者： Hideaki Harada Satoshi Suehiro daisuke Murakami Ryotaro Nakahara Takuya Nagasaka Tetsuro Ujihara Ryota Sagami Yasushi Katsuyama Kenji hayasaka Yuji Amano Department of Gastroenterology New Tokyo Hospital Department of Endoscopy New Tokyo Hospital

BACKGROUND Endoscopic submucosal dissection(ESD) for gastric neoplasms during continuous low-dose aspirin(LDA) administration is generally acceptable according to recent guidelines. This retrospective study aimed to investigate the effect of continuous LDA on the postoperative bleeding after gastric ESD in patients receiving dual antiplatelet therapy(DAPT).AIM To investigate the feasibility of gastric ESD with continuous LDA in patients with *** A total of 597 patients with gastric neoplasms treated with ESD between January2010 and June 2017 were enrolled. The patients were categorized according to type of antiplatelet therapy(APT).RESULTS The postoperative bleeding rate was 6.9%(41/597) in all patients. Patients were divided into the following two groups: no APT(n = 443) and APT(n = 154). APT included single-LDA(n = 95) and DAPT(LDA plus clopidogrel, n = 59)subgroups. In the single-LDA and DAPT subgroups, 56 and 39 patients were received continuous LDA, respectively. The bleeding rate with continuous singleLDA(10.7%) was similar to that with discontinuous single-LDA(10.3%)(P >0.99). Although the bleeding rate with continuous LDA in patients receiving DAPT(23.1%) was higher than that with discontinuous LDA in patients receiving DAPT(5.0%), no significant difference was observed(P = 0.141).CONCLUSION The bleeding rate with continuous LDA in patients receiving DAPT was not statistically different from that with discontinuous LDA in patients receiving DAPT. Therefore, continuous LDA administration may be acceptable for ESD in patients receiving DAPT, although patients should be carefully monitored for possible bleeding.

关键词： Dual antiplatelet therapy Endoscopic submucosal dissection Low-dose aspirin Postoperative bleeding Thienopyridine

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Endoscopic submucosal dissection for small submucosal tumors of the rectum compared with endoscopic submucosal resection with a ligation device

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World Journal of Gastrointestinal Endoscopy 2017年第2期9卷 70-76页

作者： Hideaki Harada Satoshi Suehiro daisuke Murakami Ryotaro Nakahara Takanori Shimizu Yasushi Katsuyama Yasunaga Miyama Kenji hayasaka Shigetaka Tounou Department of Gastroenterology New Tokyo Hospital Department of Health Service Center Tokyo Medical and Dental University Second Division of Internal Medicine Teikyo University Chiba Medical Center

AIMTo evaluate the efficacy and safety of endoscopic submucosal dissection (ESD) for small rectal submucosal tumors (SMTs). METHODSBetween August 2008 and March 2016, 39 patients were treated with endoscopic submucosal resection with a ligation device (ESMR-L) (n = 21) or ESD (n = 18) for small rectal SMTs in this study. Twenty-five lesions were confirmed by histological evaluation of endoscopic biopsy prior to the procedure, and 14 lesions were not evaluated by endoscopic biopsy. The results for the ESMR-L group and the ESD group were retrospectively compared, including baseline characteristics and therapeutic outcomes. RESULTSThe rate of en bloc resection was 100% in both groups. Although the rate of complete endoscopic resection was higher in the ESD group than in the ESMR-L group (100% vs 95.2%), there were no significant differences between the two groups (P = 0.462). In one patient in the ESMR-L group with a previously biopsied tumor, histological complete resection with a vertical margin involvement of carcinoid tumor could not be achieved, whereas there was no incomplete resection in the ESD group. The mean length of the procedure was significantly greater in the ESD group than in the ESMR-L group (14.7 ± 6.4 min vs 5.4 ± 1.7 min, P vs 2.8 ± 1.5 d, P CONCLUSIONBoth ESMR-L and ESD were effective for treatment of small rectal SMTs. ESMR-L was simpler to perform than ESD and took less time.

关键词： Leiomyoma Lipoma Rectum Submucosal tumor Endoscopic submucosal resection with a ligation device Endoscopic submucosal dissection Carcinoid tumor

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