Formation of transparent exopolymer particles, TEP, from dissolved precursor material

被引:230
作者
Passow, U [1 ]
机构
[1] Univ Calif Santa Barbara, Inst Marine Sci, Santa Barbara, CA 93106 USA
关键词
TEP; particle formation; exudation;
D O I
10.3354/meps192001
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Transparent exopolymer particles (TEP) form from polysaccharides released by many phytoplankton species, but this process by which dissolved organic matter becomes particulate is poorly understood. Here, the abiotic formation of TEP from precursors <0.2 mu m and the minimum molecular weight (MW) of TEP-precursors were studied. In most samples TEP formed from material <0.2 mu m (polycarbonate membrane filters, Poretics) when exposed to laminar shear in Couette flocculators. This result was unexpected as no TEP formed from material <0.45 mu m (polycap capsules, Whatman) due to surface coagulation onto bubbles (Zhou et al. 1998; Limnol Oceanogr 43:1860-1871). Some TEP-precursors were able to pass through dialysis bags with a nominal pore size of 8 kDa (natural cellulose, Spektrum), although their MW is presumably 2 orders of magnitude larger, suggesting that TEP-precursors can be fibrillar. It is suggested that freshly released precursors are fibrillar and that these fibrillar precursors form larger colloids and eventually TEP within hours to days after their release.
引用
收藏
页码:1 / 11
页数:11
相关论文
共 57 条
[1]   PRODUCTION OF MICROBIAL ORGANIC AGGREGATES FROM MACROPHYTE-DERIVED DISSOLVED ORGANIC MATERIAL [J].
ALBER, M ;
VALIELA, I .
LIMNOLOGY AND OCEANOGRAPHY, 1994, 39 (01) :37-50
[2]   MARINE POLYMERS .4. DIATOM POLYSACCHARIDES [J].
ALLAN, GG ;
JOHNSON, PG ;
LEWIN, J .
BOTANICA MARINA, 1972, 15 (02) :102-&
[3]   THE ABUNDANCE AND SIGNIFICANCE OF A CLASS OF LARGE, TRANSPARENT ORGANIC PARTICLES IN THE OCEAN [J].
ALLDREDGE, AL ;
PASSOW, U ;
LOGAN, BE .
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, 1993, 40 (06) :1131-1140
[4]   MASS AGGREGATION OF DIATOM BLOOMS - INSIGHTS FROM A MESOCOSM STUDY [J].
ALLDREDGE, AL ;
GOTSCHALK, C ;
PASSOW, U ;
RIEBESELL, U .
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 1995, 42 (01) :9-27
[5]  
ARNOSTI C, 1999, LIMNOLOGY OCEANOGRAP, P16
[6]   MUTUAL FLOCCULATION OF ALGAE AND CLAY - EVIDENCE AND IMPLICATIONS [J].
AVNIMELECH, Y ;
TROEGER, BW ;
REED, LW .
SCIENCE, 1982, 216 (4541) :63-65
[7]   CHARACTERIZATION OF MACROMOLECULAR FLOCCULANTS PRODUCED BY PHORMIDIUM SP STRAIN-J-1 AND BY ANABAENOPSIS-CIRCULARIS PCC-6720 [J].
BAROR, Y ;
SHILO, M .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1987, 53 (09) :2226-2230
[8]   DISSOLVED ORGANIC MATTER IN SEAWATER AS A SOURCE OF PARTICULATE FOOD [J].
BAYLOR, ER ;
SUTCLIFFE, WH .
LIMNOLOGY AND OCEANOGRAPHY, 1963, 8 (04) :369-371
[9]   CHARACTERIZATION OF METAL-BINDING BIOFLOCCULANTS PRODUCED BY THE CYANOBACTERIAL COMPONENT OF MIXED MICROBIAL MATS [J].
BENDER, J ;
RODRIGUEZEATON, S ;
EKANEMESANG, UM ;
PHILLIPS, P .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1994, 60 (07) :2311-2315
[10]   A generalized description of aquatic colloidal interactions: The three-colloidal component approach [J].
Buffle, J ;
Wilkinson, KJ ;
Stoll, S ;
Filella, M ;
Zhang, JW .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1998, 32 (19) :2887-2899