Title Author(s) Citation Issue Date 南洋パラオの海水の有機物 元田, 茂 札幌博物学会会報 = Transactions of the Sapporo Natural History Society, 16(2): 100-104 1940-02-20 DOI Doc URL http://hdl.handle.net/2115/64258 Right Type article Additional Information File Information Vol.16No.2_007.pdf Instructions for use Hokkaido University Collection of Scholarly and Academic Papers : HUSCAP O r g a n i cM a t t e ri nSeaWatero fP a l a o ,S o u t hSea by S i g e r u MoTODA {元岡武) W i t h3t e x t f i g u r e s . I ti ss of a rknownt h a tt h es e aw a t e rd e c r e a s e si t spH d u r i n gt h es t o r a g e i ndarkroomowingt ot h er e s p i r a t i o no fp l a n k t o no r g a n i s m s . T h i sd e c r e a s e o fpH,h o w e v e r ,c o n t i n u e su n t i la f t e rt h ed e a t hand decayo fp l a n k t o n duet o t h eb i o l o g i c a lo x y d a t i o no fo r g a n i c m a t t e r produced byt h ed i s s o l u t i o no f p l a n k t o n . The o r g a n i cm a t t e ri n suchac a s ei sc a l l e d byATKINS “ r e s p i r a b l e o r g a n i cm a t t e r . " * I nt h ep r e s e n t work t h er e s p i r a b l eo r g a n i cm a t t e ' ri nt h es e aw a t e ro fP a l a o , South S e a , wase s t i m a t e da tt h ef o l l o w i n gt h r e es t a t i o n s . S t . r;Mangroveswamp n e a rt h el a b o r a t o r yo ft h eP a l a oT r o p i c a lB i o l o g i c a lS t a t i o n . S t .2 ; Rebugoru P a s s a g ei n Iwayama Bay. S t . 3:Opens e ao f fb a r r i e rr e e fo fF a l a oP o r t . Thew a t e rwassampled a b o u t 20l i t r e sa l w a y si ndaytimefromt h es u r f a c eo f t h es e a( e x c e p tt h i r do b s e r v a t i o n ) and t h eb o t t l e s werea t once c o v e r e d w i t hb l a c kc l o t h e s . I nl a b o r a t o r yt h eb o t t l e s were s t o r e da i r t i g h tandp l a c e d i ndark room. Thew a t e rwas sau 】p l e d fromt h eb o t t l ethroughas i p h o na t i n t e r v a l so fafew days and oxygen c o n t e n t was d e t e r m i n e d by o r d i n a r y W1NKLER's methodand pHv a l u ewasd e t e r m i n e dc o l o r i m e t r l l y .A f t e rt a k i n g w a t e r ,t h es p a c e ,r e s u l t e da tt h et o po fb o t t l e , wasf i l l e dupw i t hl i q u i dp a r a 伍n . Ther e s u l t so ft h ef i r s to b s e r v a t i o n s on t h es e aw a t e ro ft h et h r e es t a t i o n s a r e shown i nt h ef o l l o w i n gt a b l e and g r a p h . The w a t e ro ft h e mangrove swamp and t h ebay consumed a l l oxygen i nt h eb o t t l e sd u r i n ga b o u t one month, w h i l et h ew a t e ro fopen s e ac o n s : . i m e d buta l i t t l e ,i .e .i tr e a c h e dt o t h eminimumo f2 .2c c / !a f t e r36d a y s .A f t e rt h econsumingpowerwase x h a u s t e d , t h eoxygenc o n t e n ti nb o t t l e sshowedas l i g h ti n c r e a s e ,p r o b a b l yowing t ot h e i n v a s i o nfrom w i t h o u t . 毎 A T K I N S ,W.R .G, 1 9 2 1 .J o u r .M a r .B i o l .A s s o c . ,V o l .12, p p ・7 2 ・』 748. T r a n s .S a p p o r oN a t .H i s t .S o c . ,V o l .X V I ,P t .2 ,1 9 4 0 . MoTODA:ORGANICMATTERI NSEAWATEROFPALA01SoUTHSEA D u r a t i o no fs t o r a g e Dateo 02 ( C C/ の f e s t i m a t w n 1 9 3 5 ) Bay mangrove Opens e a ( swamp swamp 1d a y s I O 20 ” ” ” 30 ,, 3 1 3 2 34 3 5 3 7 38 39 40 ” ” ” ” ” ” ” 2d a y s II J u l . 4 ,, 1 3 3 1 2 3 A u g . 2 ,, , 2 1 , ,, 32 33 3 5 36 38 39 40 4 1 ,, ,, 3 ,, 4 ,, 6 ,, 7 ,, 9 ,, IO ,, II ,, 12 ” ” ” ” ” ” ” ” 4 3・ 2 . 3 o . 6 swamp 4 . 0 2 . 8 4 . 1 3 . 6 8 . 0 5 8 . o o 1 . 2 3 . 0 7 . 8 0 7 . 6 o 7 . 6 o 0 . 1 0 . 2 5 2・ 0 . 1 O . I 0 . 1 0 . 1 一 0 . 1 0 . 1 0 . 1 0 . 1 2 . 3 2 . 2 0 . 2 O . l 2 . 2 o . 8 O . I 3 2・ 2 . 4 一 一 o . 6 pH Water t e m p . Bay b o t t l e 8 . 2 0 8 . I O 7 . 6 o 7 ・ 5 5 IOl I l l 8 . 2 5 8 . 2 0 8 . 1 0 7 ・ 95 7 ・ 70 8 . I O ・ 7 0 7 7 . 6 5 7 . 6 0 8 . 1 0 一 2 7 ・ 4C 2 6 . 7c 2 8 . 1c 2 8 . 4c 2 8 . 2c 2 8 . 3c 7 ・ 5 5 7 ・ 50 5 below7・ below7 . 5 7 . 6 o ' j . 6 0 8 . 0 7 2 8 . 3c S . o o 2 8 . 7c 8 . o o 7・ 50 8 . I O 一 一 8 . 0 5 7C 2 7・ 2 7 . 2c 2 8 . 2c 2 . 4 ¥ V a t e rwassampledonJ u l .2 .a topens e aandonJ u l .3 ・a tbayandmangroveswamp. ー み 〈 「 、 、 ー ・ , . , . h喝 ) 。 百ω 言 。 UEω 凶hM . ] 2 。 。 10 20 . J o ~ D u r a t i o no fs t o r a g e( d a y s ) The second observations made on the water ofthe bay andtheopensea, sh')wed similar r e s u l t s , m.mely the organic matter i s richer in the bay than in the open s e a . T R A N S A C T I O N SO FTHES A P P O R ONATURALI I ! S T O R YS o c I E r Y I O : ? D u r a t i o no fs t o r a g e B a y D a t eo f e s t i m a t i o n IOpensea (1935) 8d a y s II 2 7 " 3 8 ” 4 1 ” 4 2 " 4 3 ” 4 9 ” ,, 5 8 d a y s 3 0 4 1 4 4 4 5 4 6 5 2 6 1 ” ” ” ” ” ” ” S e p t . 11 ,, 1 4 ,, 2 2 O c t . II ” 22 ,, 2 5 ” 26 ” 27 N o v . 2 ,, II 0 2 ( c c / / ) B a y IOpensea B a y 4 . 1 8 . 3 0 8 . 3 0 8 . 1 0 3 . 8 2 . 7 一 回 一 8 . 3 0 8 . 2 5 一 2 . 5 8 . o o 8 . 1 5 一 7 ・ 9 7 7 . 9 5 7 ・ 7 5 一 一 2 . 5 2 . 5 一 IOpens I l l b o t t l e 8 . 3 5 4 . 2 3 ・ 3 1 . 0 02 0 . 1 0 . 1 0 . 2 . 2 W a t e r t e m p . p l 王 一 8 . 0 5 8 . 0 5 2 9 . 6c 2 7 . 5c 一 2 8 . 5c 一 2 7・ sc 2 7 . 6c 2 8 . 2c W a t e rw a ss a m p l e do nS e p t .1 1 .a to p e ns e aa n do nS e p t .1 4 .a tb a y . / C C " 4 ム Z︶ 苫ω苫。uaω 切hMO 守\ 3 2 。 。 ノ0 20 30 9oo oO 60 D u r a t i o no fs t o r a g e( d a y s ) ATKINS,havingmadeobservationsa tPlymouth, reported t h a t the changeofpH value of sea water during storage was usually most rapid i n the c o a s t a l region and decreased i nr a p i d i t y seawards. The t h i r d observations were made v e r t i c a l l y( o ,2 5 ,5 0 ,r o o , 1 5 0 , 200, and 300 metres) i n the open s e a , sampling about 500 cc ofwater from each depth. From the below t a b l e and graph i t can be seen t h a t th己 waters M O T O D A :0 R G A N ! C c M A T T E RIN S E AWATERO FP A L A O ,S O U T HS E A 1 0 3 c / la f t e rI S o f25and50metrel a y e r s showl e a s tc o n s u m p t i o n ,i .e .o n l y0 . 3 0 . 2c d a y s ,accompanyingnochangeo fp lI .Thewatero fl a y e r sdeep己rthan 150m e t r e s showed a remarkable consumption, e .g .t h e water o f I50 m e t r e s consumed oxygen o f2 . 8c c / lby 1 5 t hd a y , and pH d e c r e a s e d more t hヨn0 . 5 9・These r e s u l t s do n o tapproximate t ot h o s eo fAr即 時 i n which t h er i c h e s tl a y e ro f o r g a n i cm a t t e r was found t o be i n 20-25 metre d e p t h . ::tH;~H~3l ';夜九~IQ '~ 5~~'5" m l 主 .1=.1d S e p t . 21 4・ 3 , , d a y s 2 6 2 9 . 4c . 3 II 4 . 0 3 : V i 4 ・ 4 2 5 I O 8 . 7c 2 . 8 4 O c t . . 6I 0 . 3I 0 . 4I 8 . 2 o l8 . 3 5 l8剖 I 8 . 1 5 1 7 ・ 7 8j7 ・ 7 51 7・ 5 0 2 4 . 0I 3 . 1 o . 0I 1 5 6 2 . 8 4・ oj4 . 0 3・310410.3 c : ! ; と − 0.318.Iや518··:~18.寸~~Sw lb~·Sw I 2 7 . 4 5 4 ト ︷ミg ︶ 3 ω ロωMhMC 苫どロO 2 。 。 s- ’ o I~ 2 0 D u r a t i o no fs t o r a g e( d a y s ) The a u t h o rw i s h e st oe x p r e s sh i sh e a r t y thanks t oD r .S . HATAI, t h e d i r e c t o ro ft h eP a l a oT r o p i c a l1 3 i o l o g i c a l St 坑i o n . Thanks a r ea l s o due t ot h e Japan S o c i e t yf o rt h e Promotion o fS c i e n t i f i cR e s e a r c h ,f o rt h e 白n a n c i a la i dt o t h es o j o u r no ft h ea u t h o ra tP a l a oI s l a n c l s . He a l s o extends h i s thanks t o ’D r. S . KOKUBO f o rh i s kind g u i d a n c eg i v e nd u r i n gt h ep r e s e n ti n v e s t i g a t i o n . 10.i TRANS.ACTIONS OF THE SAPPORO NATURAL IIJSTORY 8oCIETY 摘 要 南洋バラオの海水の有機物 蔚洋バラオに於て車工樹林海、湾内.外津の三地勘より海水を採水、密閉して暗室に保存、該自毎に可 一ヶ月にし 呼吸有機物による酸素摺費及 pHの低下の度を則定せる結果、前二地勤の表商海水は殆 r 2 c c //の酸素を合有し居るを認めた P。 て酸素を会〈滑費し議したるも外滞表面海水は 36日保存後備 2 叉外津の水深 3))米までの各屠の潟水に就ては 25及 50米の海水は最も消費力強〈、 1 5:>米以深の海 水は極~て後弱なる消費カを示せり。
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