科学 · 森林地のコウモリ9800万回のコウモリの鳴き声が、保護を強化すべきイングランドの森林地を明らかにする可能性執筆 2026年10月30日 15:03 UTC視聴文字起こし0:07Recorders captured more than ninety-eight million bat calls in England's woodlands.0:10AI is helping researchers identify species and potentially overlooked habitat for0:14vulnerable bats.0:15How much can those recordings tell us about which woodlands need protection?0:19The National Woodland Bat Survey collected two hundred and seventeen terabytes of0:23recordings from three hundred and ten woodland sites.0:25Those totals sharpen the earlier description of more than ninety million calls from0:29more than three hundred woodlands.0:30The earlier figures were lower bounds, so the more precise numbers fit within them.0:35An individual bat can call repeatedly.0:37Researchers can use those sounds to investigate activity and identify species.0:41But turning call totals into animal numbers would give a misleading picture of how0:45many bats live in these woods.0:47The survey covers English woodlands with devices recording over three years.0:51Barbastles have reportedly been detected in previously unrecorded areas, especially0:55southwest England.0:56The three hundred and ten sites represent a sample of English woodland rather than0:59equivalent coverage across the whole United Kingdom.1:01Forest Research and the Bat Conservation Trust lead the project.1:04DIFRA funds it through its natural capital and ecosystem assessment program.1:08The partnership has operated since2020 .1:11One.1:12That partnership date is separate from the three-year recording period, whose exact1:16beginning and end haven't been specified.1:17The barbastelle is classified as vulnerable in both Great Britain and England.1:22Finding this rare bat in a woodland where its presence had gone unrecorded could1:25change how that habitat's importance is understood, giving conservationists a reason1:30to examine it more closely.1:31A first record tells us that a bat was detected there.1:34Better listening can reveal animals that earlier surveys missed.1:37Researchers would need other evidence to show that barbastelles are moving into new1:40territory, breeding there, or increasing in number.1:43The new detections alone can't demonstrate population recovery.1:47AI detects bat sounds and helps classify calls by species using patterns and1:51spectrograms.1:52These are pictures of sound across frequency and time.1:54The Bat Conservation Trust's sound classification system processes the recordings,1:58while verification separates an automated label from a checked biological record.2:02University College London, known as UCL, is involved in the project.2:06At this scale, analysing the audio by hand would be extremely laborious.2:10Automated processing makes the collection more practical to use, but the2:13conservation value depends on how reliably researchers identify the species behind2:17the calls.2:18The project's20204 example dataset explicitly contains unvalidated automated call2:23classifications.2:23For a rare species, checking a label has practical consequences.2:27A woodland's apparent importance could depend on whether researchers can confirm2:30that the call really belongs to that bat.2:32A separate dataset contains verified bat activity records.2:36The example's unvalidated status applies to that example, while the verified dataset2:40provides checked activity evidence.2:42Its existence doesn't mean all ninety-eight million calls were individually checked.2:46The survey, wideshare verified, isn't clear.2:48All UK bats depend on woodland for feeding, roosting, or traveling between places.2:53That makes the survey useful beyond the rare species discoveries.2:56A clearer picture of which species use different woods can help researchers identify3:00important habitat and guide future woodland management.3:03The recordings can reveal where bats are active and help identify habitat that3:07deserves closer attention.3:08Turning that information into conservation decisions requires clearly documented3:12species records.3:13The survey's practical promise rests on connecting verified detections with the3:17woods those animals use.3:18The next details needed are which woodlands contain the newly recorded barbastelles,3:23how those detections were checked, and what management decisions will follow.3:26No specific management change or measured improvement in bat populations has yet3:30been demonstrated by this survey.記事を読むストーリーの時系列HeyDex
