A Microstratification Sampler for Mud and Water

Abstract

This sampler is intended to serve as an alternative to the Jenkin sampler and as a complement to the Ekman dredge. On principle it is a long open tube made of plexiglass. The cross-section is almost square. The sampler is submerged to the desired depth and pushed into the mud. It is immediately released and thin metal slides enter rapidly into the tube and divide it into separate chambers. The high speed of the closure makes it difficult even for very agile animals to move vertically to any appreciable extent. The stratification of the sediments in the sample is almost intact as has been proved by aquarium experiments. Experiments in situ have been very successful. The sampler is intended for limnological as well as marine investigations of soft bottom sediments and of water strata close to the bottom. Pe3loMe KoJieKTop npeAcTaBsqIeT' co6o0 yCTpOfICTBO, aJIbTepHaTHBHOe HO OTHOIJmeHHIO K KOYIJ1eKTOPY ,4)KeHKHHa H CJICYHT qOrOJIHeHHeM K apare 3KMaHa. OH MmeeT BHq JUIHHHOR Tpy6KH H3 nijieKcirjiaca C nO'ITH KBaaPaTHbIM riOnepleIHbIM ceqeHHeM. KoJiieIrKTOp OnyCKaeTCq ,0 Tpe6yeMoft rnay6lHHbI H iiorpyxcaeTcs B Hii. 3aTeM ero BbIHHMaKOT H3 rPYHTa, H HeMeaJIeHHO BHYTPb Tpy6KH BBORHTCA MeTai1JIHJ1eCKHe IIJIaCTHHKH, KOTOpmIe aeJiqT ee Ha OTaejJbHbIe KaMepbi. Boibinasi CKOPOCTb 3TOR oriepaLXHH ripenrTCTByeT CKOJnbKO-HH6ygb 3aMeTHbIM BepTHKaJlbHbIM InepeABIxeHHIM XKHBOTHbIX, HaxoJA5H14XCA B cy6CTpaTe, )a)Ke HaH6oJIee nsi IIOBH)KHb1X 4)OpM. CTpaTH4HKaUHq rpyHTOBbIX OCagOqHbIX HOpOA B npo6e HOLTH He HapyInaeTCA, KaK 3TO HOKa3aYIH 3KCHepHMeHTbI B aKBapHyMe. 14CribITaHHI4 in situ npOfJIH BeCbMa yCneulHO. KojiJIeKTOp MO)KeT HCIOYIb3OBaTbCA KaK AJ1SI JIHMHOj1OrwqeCKHX, TaK H 4JIq MOPCKHX HCCjieaOBaHH14 M5lFKOrO rpyHTa H fpHAOHHOrO BOaHOIFO CJIOq. Manuscript accepted October 1967. 7* OIKOS 19, 1 (1968) This content downloaded from 157.55.39.18 on Sat, 06 Aug 2016 05:55:52 UTC All use subject to http://about.jstor.org/terms