BEN # 217

Adolf Ceska aceska at VICTORIA.TC.CA
Thu Mar 18 04:19:09 EST 1999


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No. 217                              March 18, 1999

aceska at freenet.victoria.bc.ca        Victoria, B.C.
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 Dr. A. Ceska, P.O.Box 8546, Victoria, B.C. Canada V8W 3S2
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BOTANY BC 1999 CONFERENCE IS FULL
From: Elizabeth.Easton at gems3.gov.bc.ca

Due  to an enthusiastically overwhelming response we have had to
halt registration effective  March  17,  1999  for  this  year's
Botany  BC  Conference on Saltspring Island. A waiting list will
be maintained in the event some of the registrants are unable to
attend and people will be  contacted  in  order  of  receipt  of
indication  of  interest.  It will be a week or so before a com-
plete list is available of those who are  registered  and  those
who are wait-listed.

A  list of alternate accommodations on Saltspring will be avail-
able shortly for those registrants who were unable to  get  beds
at  Cedar Beach Resort. Transportation information packages will
also be available in the near future.  For  further  information
regarding  registration  information  please  contact  Elizabeth
Easton  by  telephone  at:  (250)  953-3488  or  by  e-mail  at:
Elizabeth.Easton at gems3.gov.bc.ca or fax at: (250) 387-0046.


SYSTEMATIC STUDIES OF CLAYTONIA LANCEOLATA VAR. LUTEA

Shelly,  J.S., P. Lesica, P.G. Wolf, P.S. Soltis, & D.E. Soltis.
   1999. Systematic studies and conservation status of Claytonia
   lanceolata var. flava (Portulacaceae). Madrono  45(1998): 64-
   74.

Abstract.  A  biosystematic  study  of  Claytonia lanceolata and
related taxa in the Rocky Mountains was undertaken  to  evaluate
the taxonomic status of C. lanceolata var. flava. This study was
part  of  a broader assessment to determine the need for protec-
tion of the latter taxon under the  federal  Endangered  Species
Act.  Electrophoretic and morphological studies revealed that C.
lanceolata var. flava in southwestern Montana  and  northwestern
Wyoming  represents  a  distinct  diploid  species  (n=8)  whose
populations consist of  yellow-  and/or  white-flowered  plants.
Morphological,  allozyme, and cytological data all indicate that
this taxon does not belong in the C. lanceolata complex, but  is
best  placed in the group of narrow-leaved species that includes
C. rosea, C. tuberosa, and C. virginica. Numerous populations of
C. lanceolata var. flava, most often consisting  of  the  white-
flowered phenotype, were found in Montana and Wyoming, and legal
protection is not warranted at this time. In some cases, actions
to conserve endangered plant taxa must be preceded by an evalua-
tion  of  their  taxonomic  status;  this  study illustrates the
utility of biosystematic techniques in conducting  such  evalua-
tions.  [The  authors did not make formal nomenclatural changes,
but left them for publication of  a  complete  revision  of  the
genus undertaken by Miller & Chambers.]


AVIAN USE OF PURPLE LOOSESTRIFE DOMINATED HABITAT

Whitt,  M.B.,  H.H.  Prince,  &  R.R. Cox jr. 1999. Avian use of
   purple  loosestrife  dominated  habitat  relative  to   other
   vegetation  types  in  a  Lake  Huron wetland complex. Wilson
   Bull. 111: 105-114.

Abstract. - Purple loosestrife (Lythrum  salicaria),  native  to
Europe,  is  an introduced perennial plant in North America wet-
lands that displaced other wetland  plants.  Although  not  well
studied,  purple  loosestrife  is widely believed to have little
value as habitat for birds.  To  examine  the  value  of  purple
loosestrife as avian breeding habitat, we conducted early, mid-,
and late season bird surveys during two years (1994 and 1995) at
258  18-m  (0.1  ha)  fixed-radius  plots in coastal wetlands of
Saginaw Bay, Lake Huron.  We  found  that  loosestrife-dominated
habitats had higher avian densities, but lower avian diversities
than other vegetation types. The six most commonly observed bird
species  in  all  habitats combined were Sedge Wren (Cistothorus
platensis), Marsh Wren (C. palustris), Yellow Warbler (Dendroica
petechia),  Common  Yellowthroat  (Geothlypis  trichas),   Swamp
Sparrow   (Melospiza   georgiana),   and   Red-winged  Blackbird
(Agelaius phoeniceus). Swamp Sparrow densities were highest  and
Marsh  Wren  was  lowest  in  loosestrife dominated habitats. We
observed ten breeding species in loosestrife dominated habitats.
We conclude that  avian  use  of  loosestrife  warrants  further
quantitative  investigation because avian use may be higher than
is commonly believed.

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