|
Gosh, nearly went in. I think that' s about three minutes now, so shall we call it a day? Yup. So I just tip it all in? Yeah, tip it in. Push it around a bit. There' s all sorts of little creatures whizzing about all over the place. This is a flatbodied stone clinger. Looks a bit scorpionlike in a way. Yeah. These are the ones that are very sensitive to pollutants, so they' d be the first things that would disappear. I mean, this is an olive, so the olives will tend to stay in the river after the stone flies and the flatbodied ones have gone. So are people expected to actually to look at a tray like this and count every single one? Presumably not. No. We estimate the abundance, and then if this number suddenly dropped from hundreds to tens or from tens just to singles, then you know there might be a problem. To an untrained eye this looks like a healthy river. Would you say it is? Yeah? Well, I wouldn' t say you' re untrained, you' ve been on the course all day. No, I agree, it looks pretty healthy, you' ve got high abundance of most of the groups, and all of the target groups are present there. Yeah. So can' t really hope for anything better. |
|
tiān, chà diǎn diào xià qù. xiàn zài chà bù duō yǒu sān fēn zhōng le, zhè yàng jiù gòu le ma? shì de dào chū lái jiù xíng le ma shì, dào chū lái, shāo wēi huàng huǎng. zhè lǐ yǒu gè zhǒng xiǎo shēng wù sōu sōu dì yóu lái yóu qù. zhè shì zhǒng nián zhe zài shí tou shàng de biǎn tǐ chóng, zhǎng de yǒu diǎn xiàng xiē zǐ. shì de, tā men duì wū rǎn wù fēi cháng mǐn gǎn. suǒ yǐ rú guǒ yǒu wū rǎn, tā men huì shǒu xiān xiāo shī. zhè shì zhǐ fěi luó, fěi luó gèng xǐ huān dài zài hé lǐ. jí shǐ wū rǎn yán zhòng dào shí yíng hé biǎn tǐ kūn chóng xiāo shī, suǒ yǐ rén men zhēn zhǔn bèi kàn zhe zhè gè tuō pán, duì měi zhǒng kūn chóng jì shù ma? yīng gāi bú huì ba bù, wǒ men duì shù mù jìn xíng gū jì. rú guǒ shù mù tū rán cóng jǐ bǎi zhòu jiǎn zhì jǐ shí, huò zhě cóng jǐ shí jiǎn zhì jǐ gè, nà me jiù kě néng cún zài wū rǎn wèn tí le. duì yú wèi jīng xùn liàn de wǒ, zhè tiáo hé hǎo xiàng tǐng jiàn kāng de. nǐ jué de ne? shì ma? wǒ jué de nǐ suàn jīng guò xùn liàn ba. nǐ zhěng tiān dū pào zài zhè gè yán jiū shàng. bù, wǒ tóng yì, tā kàn shang qu tǐng jiàn kāng. bì jìng nǐ yǐ qǔ de dà bù fèn zhǒng qún de dà liàng yàng běn, wǒ men yù qī de zhǒng qún dōu zài. méi cuò suǒ yǐ qíng kuàng hěn bù cuò le |