Diatom community structure along environmental and spatial gradients in lakes and streams

被引:55
作者
Soininen, Janne [1 ]
Weckstrom, Jan [1 ]
机构
[1] Univ Helsinki, Dept Biol & Environm Sci, FIN-00014 Helsinki, Finland
基金
芬兰科学院;
关键词
diatoms; lentic; lotic; NMDS; PCNM; spatial structure; unicellular organisms; variation partitioning; FRESH-WATER DIATOMS; METACOMMUNITY STRUCTURE; QUANTITATIVE INDICATORS; DIVERSITY; DISPERSAL; SCALE; BIOGEOGRAPHY; ASSEMBLAGES; TEMPERATURE; PATTERNS;
D O I
10.1127/1863-9135/2009/0174-0205
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
The aims of this study were to examine whether lentic and lotic diatom communities exhibit distinct groupings following habitat preferences and whether lentic and lotic diatom communities differ in terms of spatial structure at regional scales in Finnish Lapland. Principal Component Analysis (PCA) was used to describe the main gradients in water chemistry. Non-metric Multidimensional Scaling (NMDS) was used to examine patterns in diatom community structure. Redundancy Analysis (RDA) with variation partitioning was employed to examine the spatial structure of lentic and lotic communities. Principal coordinates of neighbour matrices was used to model the spatial variables in variation partitioning. The PCA showed that the main gradients in water chemistry of lakes and streams were relatively similar in the study area in northern Finland although the main PCA gradient was more related to water pH in lakes, whereas in streams the main PCA gradient was mainly related to alkalinity and conductivity. According to NMDS. however, the lake and stream diatom communities differed sharply. RDA with variation partitioning showed that pure spatial factors explained more of the explained variation for the streams (28 %) than for the lakes (9 %). Pure environmental factors nonetheless explained most of the variation both for the lakes (74 %) and streams (58 %). Our results lent support to a notion that diatoms are probably jointly structured by neutral, dispersal-related processes and species sorting by the environment. as both environmental and spatial factors had a notable effect on community structure. We emphasize though that local environmental control was overall much stronger than the effects of large-scale geographical and dispersal-related factors both in lakes and streams.
引用
收藏
页码:205 / 213
页数:9
相关论文
共 52 条
  • [1] Allan J.D., 1995, STREAM ECOLOGY
  • [2] [Anonymous], 1981, ECOLOGY ALGAE, DOI DOI 10.1017/S0025315400057507
  • [3] Beisner BE, 2006, ECOLOGY, V87, P2985, DOI 10.1890/0012-9658(2006)87[2985:TROEAS]2.0.CO
  • [4] 2
  • [5] All-scale spatial analysis of ecological data by means of principal coordinates of neighbour matrices
    Borcard, D
    Legendre, P
    [J]. ECOLOGICAL MODELLING, 2002, 153 (1-2) : 51 - 68
  • [6] PARTIALLING OUT THE SPATIAL COMPONENT OF ECOLOGICAL VARIATION
    BORCARD, D
    LEGENDRE, P
    DRAPEAU, P
    [J]. ECOLOGY, 1992, 73 (03) : 1045 - 1055
  • [7] Integrating environmental and spatial processes in ecological community dynamics
    Cottenie, K
    [J]. ECOLOGY LETTERS, 2005, 8 (11) : 1175 - 1182
  • [8] Cottenie K, 2003, ECOLOGY, V84, P991, DOI 10.1890/0012-9658(2003)084[0991:ZMSRVL]2.0.CO
  • [9] 2
  • [10] Biogeography of bacterioplankton in lakes and streams of an arctic tundra catchment
    Crump, Byron C.
    Adams, Heather E.
    Hobbie, John E.
    Kling, George W.
    [J]. ECOLOGY, 2007, 88 (06) : 1365 - 1378