北极圈海象数量回升 3000只沿岸现身聚集
(莫斯科11日综合电)俄罗斯科学家近期在北部卡拉海沿岸,发现一大群大西洋海象群聚在陆地上进行着社交活动。科学家指出这可能是海象数量正在恢复的信号,令人鼓舞。
该海滩位于俄罗斯亚马尔半岛的一个偏僻角落,研究人员发现有3000多只海象挤在这里,而近几十年来,该地区只发现过数十只大西洋海象。
海象的这种行为称为”Haul-out”,指海豹、海狮和海象等暂时离开水中,通常发生在觅食期间,为了繁殖和休息等原因,将自己拖行到陆地或海冰上。

海象在卡拉海沿岸聚集的奇观。
海象”Haul-out”通常出现在漂流的海冰或北极岛屿上,但由于全球气候暖化造成海冰缩小,此外海象的栖息地也受到油气勘探及北极海运量增加的威胁。
俄罗斯科学院的资深北极研究员索科洛夫表示,这次的”Haul-out”现象是独特的,因为既有雌性又有雄性海象,而且年龄范围也很广,让他和团队能够一次分析成千上万只海象。
科学家已经采集这群海象的脱氧核糖核酸(DNA)样本,并在其中几只安装了卫星追踪器,将监视它们的动向数个月。
20世纪中期国际正式禁止商业捕猎前,海象因身上的油脂和象牙而受到过度捕捞。国际自然保护联盟(IUCN)2016年将大西洋海象列为”近危物种”,估计世界上成年大西洋海象总数只剩1.25万只。
文 :综合
图 :互联网
视频:YouTube
*本網站有權刪除或封鎖任何具有性別歧視、人身攻擊、庸俗、詆毀或種族主義性質的留言和用戶;必須審核的留言,或將不會即時出現。
SQL: Array
(
[0] => Array
(
[query] => SELECT * FROM "wp_posts" WHERE "wp_posts"."ID" = :MeD0_mK AND "wp_posts"."post_status" = :MeD1_mK LIMIT 1
[params] =>
[time_ms] => 0.607014
)
[1] => Array
(
[query] => SELECT tt.term_id as tagid from wp_term_relationships tr
left join `wp_term_taxonomy` tt On tt.term_taxonomy_id = tr.term_taxonomy_id
WHERE tt.taxonomy IN ('post_tag')
AND tr.object_id = 2278902
[params] =>
[time_ms] => 0.510931
)
[2] => Array
(
[query] => SELECT "wp_terms"."term_id" AS "term_id","wp_terms"."name" AS "name","wp_terms"."slug" AS "slug","wp_terms"."term_order" AS "term_order","wp_term_taxonomy"."description" AS "description","wp_term_taxonomy"."parent" AS "parent","wp_term_taxonomy"."count" AS "count","wp_term_taxonomy"."taxonomy" AS "tax" FROM "wp_terms" LEFT JOIN "wp_term_taxonomy" USING ("term_id") WHERE "wp_terms"."term_id" = :MeD2_mK AND "wp_term_taxonomy"."taxonomy" = :MeD3_mK LIMIT 1
[params] =>
[time_ms] => 0.224113
)
[3] => Array
(
[query] => SELECT "wp_terms"."term_id" AS "term_id","wp_terms"."name" AS "name","wp_terms"."slug" AS "slug","wp_terms"."term_order" AS "term_order","wp_term_taxonomy"."description" AS "description","wp_term_taxonomy"."parent" AS "parent","wp_term_taxonomy"."count" AS "count","wp_term_taxonomy"."taxonomy" AS "tax" FROM "wp_terms" LEFT JOIN "wp_term_taxonomy" USING ("term_id") WHERE "wp_terms"."term_id" = :MeD4_mK AND "wp_term_taxonomy"."taxonomy" = :MeD5_mK LIMIT 1
[params] =>
[time_ms] => 0.347853
)
[4] => Array
(
[query] => SELECT "meta_key","meta_value" FROM "wp_postmeta" WHERE "post_id" = :MeD6_mK
[params] =>
[time_ms] => 0.409126
)
[5] => Array
(
[query] => SELECT * FROM "wp_posts" WHERE "wp_posts"."ID" = :MeD7_mK AND "wp_posts"."post_status" = :MeD8_mK LIMIT 1
[params] =>
[time_ms] => 0.350952
)
[6] => Array
(
[query] => SELECT * FROM "wp_posts" WHERE "wp_posts"."ID" = :MeD9_mK AND "wp_posts"."post_status" = :MeD10_mK LIMIT 1
[params] =>
[time_ms] => 0.244856
)
[7] => Array
(
[query] => SELECT * FROM "wp_posts" WHERE "wp_posts"."ID" = :MeD11_mK AND "wp_posts"."post_status" = :MeD12_mK LIMIT 1
[params] =>
[time_ms] => 0.323057
)
[8] => Array
(
[query] => SELECT tt.term_id as tagid from wp_term_relationships tr
left join `wp_term_taxonomy` tt On tt.term_taxonomy_id = tr.term_taxonomy_id
WHERE tt.taxonomy IN ('post_tag')
AND tr.object_id = 2278902
[params] =>
[time_ms] => 0.233889
)
[9] => Array
(
[query] => SELECT "wp_terms"."term_id" AS "term_id","wp_terms"."name" AS "name","wp_terms"."slug" AS "slug","wp_terms"."term_order" AS "term_order","wp_term_taxonomy"."description" AS "description","wp_term_taxonomy"."parent" AS "parent","wp_term_taxonomy"."count" AS "count","wp_term_taxonomy"."taxonomy" AS "tax" FROM "wp_terms" LEFT JOIN "wp_term_taxonomy" USING ("term_id") WHERE "wp_terms"."term_id" = :MeD13_mK AND "wp_term_taxonomy"."taxonomy" = :MeD14_mK LIMIT 1
[params] =>
[time_ms] => 0.176907
)
[10] => Array
(
[query] => SELECT "wp_terms"."term_id" AS "term_id","wp_terms"."name" AS "name","wp_terms"."slug" AS "slug","wp_terms"."term_order" AS "term_order","wp_term_taxonomy"."description" AS "description","wp_term_taxonomy"."parent" AS "parent","wp_term_taxonomy"."count" AS "count","wp_term_taxonomy"."taxonomy" AS "tax" FROM "wp_terms" LEFT JOIN "wp_term_taxonomy" USING ("term_id") WHERE "wp_terms"."term_id" = :MeD15_mK AND "wp_term_taxonomy"."taxonomy" = :MeD16_mK LIMIT 1
[params] =>
[time_ms] => 0.195026
)
)
Redis: Array
(
[0] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => HGET
[1] => post_info:2278902
[2] => info
)
[time_ms] => 0.23
)
[1] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => HGET
[1] => category_info:all
[2] => info
)
[time_ms] => 0.61
)
[2] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => ZRANGE
[1] => termlist45534
[2] => 0
[3] => 7
)
[time_ms] => 0.2
)
[3] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => HGET
[1] => post_info:3080485
[2] => info
)
[time_ms] => 0.17
)
[4] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => HGET
[1] => post_info:1911511
[2] => info
)
[time_ms] => 0.19
)
[5] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => ZRANGE
[1] => termlist68368
[2] => 0
[3] => 7
)
[time_ms] => 0.19
)
)