国际最新气候变化研究:鲸鱼粪便可记录与变暖相关有毒藻华|亚无码乱人伦一区二区

  中新网北京7月10日电 (记者 孙自法)国际知名学术期刊《自然》最新发表一篇气候变化论文称,研究人员通过分析弓头鲸的粪便样本,发现食物链中藻华毒素增加与海洋温度升高的关联。

  这一研究发现建立在北极地区近20年数据的基础上,或有助于深入理解变暖的海洋如何导致藻类毒素浓度升高,进而影响当地社区的食品安全。

  该论文介绍,过去20年间,北极经历了海洋变暖和海冰损失,这改变了海洋的环境。这类改变可能为有害藻华提供了适宜生长条件,这些藻华产生的毒素对野生动物和人类可能造成不利影响。但关于北极地区这些有害毒素的暴露水平变化,相关数据还很有限。

  在本项研究中,论文第一作者兼通讯作者、美国国家海洋渔业局Kathi A. Lefebvre和同事及合作者一起,调查了波弗特海205头弓头鲸肠道样本,其数据收集超过19年,随后进行了详细的毒素定量分析,以评估北极食物网中藻类毒素的存在情况。

  他们发现,藻类毒素浓度与海洋温度变化明显相关,其他相关因素还有开放水域面积(即无冰水域大小)、风速以及大气压力。结果显示,较高的毒素水平与海洋变暖加剧、海冰覆盖减少有关。

  论文作者总结说,这项研究发现表明,有更多毒素进入食物链,影响海洋生物,并潜在地影响那些依赖海洋来源食物的人类。他们建议持续监测海洋生物中有毒藻华情况,以保护依赖这些食物来源的北极社区。(完)

###tongxingbanguangansuangaoshuomingshenme?tongxingbanguangansuan(Homocysteine)shiyizhonganjisuan,tazaitineidedaixieguochengzhongqizhezhongyaodezuoyong。dangwomendetongxingbanguangansuanshuipingguogaoshi,kenenghuiyinfayixiliejiankangwenti,yincizhidezhongshi。shouxian,tongxingbanguangansuanshuipingshenggaochangchangyuxinxueguanjibingyouguan。yanjiubiaoming,xueyezhongtongxingbanguangansuannongdudezengjiayudongmaizhouyangyinghua、xinzangbinghezhongfengdefengxianchengzhengxiangguan。zheshiyinweigaoshuipingdetongxingbanguangansuankenenghuisunshangxueguanneibi,cujinbankuaixingcheng,congeryingxiangxueliu,zengjiaxinzangbingfazuodefengxian。tongxingbanguangansuanshuipingshenggaohaikenengyushenjingxitongdejiankangxiangguan。yanjiufaxian,chixugaoshuipingdetongxingbanguangansuankenengyurenzhigongnengxiajianghelaonianchidaizheng(youqishieercihaimobing)defengxianzengjiayouyidingguanlian。zhebiaoming,weihushidangdetongxingbanguangansuanshuipingkenengduidanaojiankangzhiguanzhongyao。ciwai,mouxieyingyangsudequefayehuidaozhitongxingbanguangansuanshuipingshenggao。liru,weishengsuB6、B12yijiyesuanquefadouhuiyingxiangtongxingbanguangansuandezhengchangdaixie。yinci,baozhengjunhengdeyinshi,sheruzugoudeweishengsuhekuangwuzhi,nenggouzaiyidingchengdushangjiangditongxingbanguangansuandeshuiping,jinerjiangdixiangguanbingzhengdefengxian。zongeryanzhi,tongxingbanguangansuanshuipingshenggaokenengshixiandaishehuixuduorenxuyaoguanzhudejiankangzhibiao#(#)#(#)#(#)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)高(gao)说(shuo)明(ming)什(shen)么(me)?(?)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)((()H(H)o(o)m(m)o(o)c(c)y(y)s(s)t(t)e(e)i(i)n(n)e(e))())是(shi)一(yi)种(zhong)氨(an)基(ji)酸(suan),(,)它(ta)在(zai)体(ti)内(nei)的(de)代(dai)谢(xie)过(guo)程(cheng)中(zhong)起(qi)着(zhe)重(zhong)要(yao)的(de)作(zuo)用(yong)。(。)当(dang)我(wo)们(men)的(de)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)水(shui)平(ping)过(guo)高(gao)时(shi),(,)可(ke)能(neng)会(hui)引(yin)发(fa)一(yi)系(xi)列(lie)健(jian)康(kang)问(wen)题(ti),(,)因(yin)此(ci)值(zhi)得(de)重(zhong)视(shi)。(。)首(shou)先(xian),(,)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)水(shui)平(ping)升(sheng)高(gao)常(chang)常(chang)与(yu)心(xin)血(xue)管(guan)疾(ji)病(bing)有(you)关(guan)。(。)研(yan)究(jiu)表(biao)明(ming),(,)血(xue)液(ye)中(zhong)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)浓(nong)度(du)的(de)增(zeng)加(jia)与(yu)动(dong)脉(mai)粥(zhou)样(yang)硬(ying)化(hua)、(、)心(xin)脏(zang)病(bing)和(he)中(zhong)风(feng)的(de)风(feng)险(xian)呈(cheng)正(zheng)相(xiang)关(guan)。(。)这(zhe)是(shi)因(yin)为(wei)高(gao)水(shui)平(ping)的(de)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)可(ke)能(neng)会(hui)损(sun)伤(shang)血(xue)管(guan)内(nei)壁(bi),(,)促(cu)进(jin)斑(ban)块(kuai)形(xing)成(cheng),(,)从(cong)而(er)影(ying)响(xiang)血(xue)流(liu),(,)增(zeng)加(jia)心(xin)脏(zang)病(bing)发(fa)作(zuo)的(de)风(feng)险(xian)。(。)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)水(shui)平(ping)升(sheng)高(gao)还(hai)可(ke)能(neng)与(yu)神(shen)经(jing)系(xi)统(tong)的(de)健(jian)康(kang)相(xiang)关(guan)。(。)研(yan)究(jiu)发(fa)现(xian),(,)持(chi)续(xu)高(gao)水(shui)平(ping)的(de)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)可(ke)能(neng)与(yu)认(ren)知(zhi)功(gong)能(neng)下(xia)降(jiang)和(he)老(lao)年(nian)痴(chi)呆(dai)症(zheng)((()尤(you)其(qi)是(shi)阿(e)尔(er)茨(ci)海(hai)默(mo)病(bing))())的(de)风(feng)险(xian)增(zeng)加(jia)有(you)一(yi)定(ding)关(guan)联(lian)。(。)这(zhe)表(biao)明(ming),(,)维(wei)护(hu)适(shi)当(dang)的(de)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)水(shui)平(ping)可(ke)能(neng)对(dui)大(da)脑(nao)健(jian)康(kang)至(zhi)关(guan)重(zhong)要(yao)。(。)此(ci)外(wai),(,)某(mou)些(xie)营(ying)养(yang)素(su)的(de)缺(que)乏(fa)也(ye)会(hui)导(dao)致(zhi)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)水(shui)平(ping)升(sheng)高(gao)。(。)例(li)如(ru),(,)维(wei)生(sheng)素(su)B(B)6(6)、(、)B(B)1(1)2(2)以(yi)及(ji)叶(ye)酸(suan)缺(que)乏(fa)都(dou)会(hui)影(ying)响(xiang)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)的(de)正(zheng)常(chang)代(dai)谢(xie)。(。)因(yin)此(ci),(,)保(bao)证(zheng)均(jun)衡(heng)的(de)饮(yin)食(shi),(,)摄(she)入(ru)足(zu)够(gou)的(de)维(wei)生(sheng)素(su)和(he)矿(kuang)物(wu)质(zhi),(,)能(neng)够(gou)在(zai)一(yi)定(ding)程(cheng)度(du)上(shang)降(jiang)低(di)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)的(de)水(shui)平(ping),(,)进(jin)而(er)降(jiang)低(di)相(xiang)关(guan)病(bing)症(zheng)的(de)风(feng)险(xian)。(。)总(zong)而(er)言(yan)之(zhi),(,)同(tong)型(xing)半(ban)胱(guang)氨(an)酸(suan)水(shui)平(ping)升(sheng)高(gao)可(ke)能(neng)是(shi)现(xian)代(dai)社(she)会(hui)许(xu)多(duo)人(ren)需(xu)要(yao)关(guan)注(zhu)的(de)健(jian)康(kang)指(zhi)标(biao)

发布于:北京市