Spatial differences in macroinvertebrate communities in intertidal seagrass habitats and unvegetated sediment in three New Zealand estuaries

Estuaries ◽  
2004 ◽  
Vol 27 (6) ◽  
pp. 945-957 ◽  
Author(s):  
K. S. S. van Houte-Howes ◽  
S. J. Turner ◽  
C. A. Pilditch
Keyword(s):  
New Zealand ◽  
Macroinvertebrate Communities ◽  
Spatial Differences ◽  
Intertidal Seagrass

scholarly journals A Polyethylenetherephthalate (PET) device for sampling freshwater benthic macroinvertebrates

2004 ◽  
Vol 64 (3a) ◽  
pp. 531-541 ◽  
Author(s):  
C. Volkmer-Ribeiro ◽  
D. L. Guadagnin ◽  
R. De Rosa-Barbosa ◽  
M. M. Silva ◽  
S. Drügg-Hahn ◽  
...  
Keyword(s):  
Benthic Macroinvertebrates ◽  
Diversity Index ◽  
Macroinvertebrate Communities ◽  
Total Abundance ◽  
Tropical River ◽  
New Device ◽  
Four Seasons ◽  
Spatial Differences ◽  
Shannon’S Diversity Index ◽  
Similarity Matrices

A new device to sample freshwater benthic macroinvertebrates was used in a low and sandy stretch of a Brazilian sub-tropical river (the River Caí, Triunfo, RS) and in one of its small tributaries, Bom Jardim brook (Arroio Bom Jardim). In this study, the effectiveness of this device, a PET sampler, was tested at different sites in the river and the brook throughout the four seasons between 2001-2002. Comparisons were made by PCA and ANOVA, both employing a bootstrap procedure based on similarity matrices. The PET sampler proved to be a reliable tool for detection of seasonal and spatial differences in richness, total abundance of organisms, and Shannon's diversity index in both river and brook and is therefore recommended for use in the monitoring of macroinvertebrate communities in this system.

Ecoregional differences in macrophyte and macroinvertebrate communities between Westland and Waikato: Are all New Zealand lowland streams the same?

2002 ◽  
Vol 36 (4) ◽  
pp. 831-845 ◽  
Author(s):  
I. C. Duggan ◽  
K. J. Collier ◽  
P. D. Champion ◽  
G. F. Croker ◽  
R. J. Davies‐Colley ◽  
...  
Keyword(s):  
New Zealand ◽  
Macroinvertebrate Communities ◽  
Lowland Streams

Adjustment of photoprotection to tidal conditions in intertidal seagrasses

2016 ◽  
Vol 97 (3) ◽  
pp. 571-579 ◽  
Author(s):  
D. Kohlmeier ◽  
C.A. Pilditch ◽  
J. F. Bornman ◽  
K. Bischof
Keyword(s):  
New Zealand ◽  
High Tide ◽  
High Irradiance ◽  
Photochemical Quenching ◽  
Effective Quantum Yield ◽  
Dynamic Adjustment ◽  
Seagrass Meadows ◽  
Lower Light ◽  
Intertidal Seagrass ◽  
Non Photochemical Quenching

Light adaptive strategies were studied in a comparative analysis of the congeneric seagrass species Zostera muelleri and Zostera marina at two case study areas in New Zealand and Germany. Surveys in intertidal seagrass meadows were conducted from pre-dawn until sunset on days when either low or high tide coincided with noon. The results show marked fluctuations of photophysiology (optimum and effective quantum yield, non-photochemical quenching, cycling of xanthophyll cycle (XC) pigments) over daily and tidal cycles. At both locations, we observed a near complete conversion (de-epoxidation) of violaxanthin to zeaxanthin at times with high irradiance and a rapid and complete re-epoxidation under subsequent lower light conditions. At the New Zealand site we also observed significantly larger XC-pigment pool sizes in seagrass leaves sampled in a week when low tide coincided with noon (larger daily fluence and higher maximum irradiance), compared with leaves sampled in a week when high tide was at noon. This dynamic adjustment of xanthophyll pool size has not been previously reported for intertidal seagrasses. It adds to our understanding of an important adaptive feature in a highly dynamic light environment and to the general ecology and adaptability of seagrasses.

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