María Moreno-Alcántara, Gerardo Aceves-Medina & Bertha E.
Lavaniegos-Espejo [email protected]; [email protected]
■ La Niña: 2010-2012 ■ NE Pacific Marine Heat Wave: 2013-2015 ■
El Niño: 2015-2016
This study California Current California Undercurrent
California Countercurrent Equatorial Water
WINTER SPRING
Introduction
IMECOCAL 1201 IMECOCAL 1203
PUNTA EUGENIA
PUNTA BAJA
ENSENADA
IMECOCAL 1302 IMECOCAL 1305 BIPOCO 1412
IMECOCAL 1601
IMECOCAL 1604
0%
20%
40%
60%
80%
100%
1201 1203 1302 1305 1412 1601 1604A. brunnea A. californiensis
A. fragilis A. helicinoidea
A. inclinata A. inflata A. lesueurii A. oligogyra
A. peronii A. rosea A. tokiokai A. turriculata
Atlanta sp. 1 Atlanta spp. P. souleyeti
0
2
4
6
8
10
12
14
16
1201 1203 1302 1305 1412 1601 1604
Spring Winter
Number of species per survey
Methods
Results
Conclusions 284 zooplankton samples
7 SURVEYS: 4 Winter & 3 Spring
Bongo net 505 µm with flow meter
210 m maximum depth
CTD to 1000 m
Relative abundance
14 species: 2 new records for the American Pacific, 5 northward
range extentions
Wat
er m
asse
s 1203 1604 1305 1201 1302 1412
1601
Seasonal shifts in the diversity of Atlantidae and decreased
relative abundance of A. californiensis during interannual
anomalous warming conditions, make atlantids good indicators of
intra and inter-annual environmental changes.
The Atlantidae gastropods have a short holoplanktonic life cycle
and respond rapidly to environmental changes. In order to prove
their potential as indicators of climate change, we analyzed the
effect of the inter and intra-annual environmental variability on
their distribution and abundance in the Southern California Current
Region.
