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Figure 2 Areas with claims registered by ISA. Generally, bottom-sediment chemistry is stable. Bacterial activity acts to oxidise the organic material present, and oxygen concentrations decline with sediment depth. Ammonia concentrations in DOMES samples showed significant enrichment over near-bottom water, presumably a result of metabolic activity. Detailed sampling of the bottom in the CCFZ is reported in several papers 15 . These collections indicate that the sediments consist predominantly of recent and Pleistocene pelagic radiolarian, calcareousargillaceous and argillaceous ooze with highly variable nodule abundances (from 0 to more than 15 kilograms per square metre). The bulk density of the sediments may vary within the range 1.1-1.62 (mean value 1.19 grams/cm), with moisture contents of 52-85% (mean of about 76%) and porosities of 71-93% (average porosity of about 87%). The diatomaceousargillaceous ooze pelite fractions (less than 0.01 mm) comprise 50-85% of the sediments and have a dry specific gravity of 0.4-0.9. The argillaceous INTERNATIONAL SEABED AUTHORITY 114
ooze can consist of more than 90% of pelite and up to 40% or more of subcolloidal fractions of a size less than 0.001 mm. Sharma and Rao 16 report that the seabed in the Indian claim area primarily consists of biogenic sediments, manganese nodule deposits, massive rocky exposures and associated ferromanganese crust deposits. Siliceous ooze is the primary component of the sediments, with a thin strip of calcareous foraminiferal and coccolithid ooze in the western parts of the claim and some red clays in the southern part. 5.3. Benthic currents Recent work funded through WOCE has retrieved benthic current data from one current-meter array located in the southwest corner of the area of the Indian claim (20° S, 72° 29.2' E) 17 . Summaries of the data retrieved from the meters at 99 and 1099 m off the seafloor are presented in table 2. The currents appear to be generally southerly, with mean speeds of a few cm/sec and maxima >10 cm/sec. These means and maxima are consistent with the currents in the CCFZ (discussed in subsection 5.3.1 below). Benthic currents on and between abyssal hills in this zone have been documented by a number of authors 18 (see Figure 3). Table 2 Benthic currents in the south central Indian Ocean. Parameter Minimum Mean Maximum Std Dev. Meter at 3,014 m Speed (cm/sec) 0.93 2.23 10.30 1.72 Direction (degrees true) 0.30 189.43 359.93 100.76 Eastward component (cm/sec) -7.94 -0.15 9.43 1.94 Northward component (cm/sec) -9.54 -0.13 10.26 2.03 Temperature (degrees C) 1.47 1.55 1.64 0.02 Meter at 4,014 m Speed (cm/sec) 0.93 2.04 8.01 1.33 Direction (degrees true) 0.07 186.68 359.71 109.05 Eastward component (cm/sec) -5.58 0.01 7.94 1.72 Northward component (cm/sec) -6.08 0.19 6.49 1.72 Temperature (degrees C) 1.42 1.44 1.48 0.01 Total water depth 4,113 m. Deployment 14 May 1995 - 26 January 1997. Data from WOCE programme 19 . 115 INTERNATIONAL SEABED AUTHORITY
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STANDARDIZATION OF ENVIRONMENTAL DA
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The designations employed and the p
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Chapter 8 Chapter 9 Chapter 10 Chap
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Standardization of Environmental Da
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Foreword Statement by the Secretary
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Participants Mr. Baïdy Diène, Spe
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Dr. Rahul Sharma, Scientist, Nation
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“Necessary measures shall be take
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three working groups, on chemistry
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Some vital procedures are not amena
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(Kingston, Jamaica), 289 pp. The re
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He observed that the Regulations, u
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Dr. Smith reviewed in detail the pr
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Notes and References 1. Internation
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- The Authority must be notified of
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area, but within one or two years e
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- A description of proposed measure
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??It has been previously made avail
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SUMMARY OF DISCUSSION Financial obl
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In the discussion, flexibility in t
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Chapter 2 Overview of the Authority
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2.3. Chemical oceanography - Object
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3. Environmental Impact Assessment
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?? Nodule crushing methods, if any;
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SUMMARY OF DISCUSSION Biological co
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The Secretary-General responded tha
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edeposit on the surrounding seafloo
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1.3. Importance of standardization
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detailed guidelines recommended by
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and “transect physical oceanograp
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eference to seven biological catego
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2.4.1.6. Demersal scavengers It is
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e measured must be specified. I rec
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3.2. Taxonomic standardization I st
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ecological comparisons. Several oth
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that supplied the benthos with ener
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speculate on the rates of recolonis
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Geographical variation Speaking nex
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Knowledge limitations Concluding hi
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on the other hand it turned out tha
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ecolonisation rates. If the area wa
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had been used to look at resediment
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ecover. In the case of the seabed,
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13. International Seabed Authority,
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Chapter 3 Current State of Knowledg
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side. Exploration contractors will
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However, for scientific endeavours
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50-m altitude (i.e., within the bot
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2.4. Biological communities The LTC
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sediment/water interface of each bo
Page 101 and 102: strata), with sampling on a diel ba
Page 103 and 104: abyssal seafloor communities 25 sea
Page 105 and 106: very useful to the design of baseli
Page 107 and 108: PRESENTATION ON DEEP-SEA ECOSYSTEM
Page 109 and 110: Most of the seabed macrofauna in th
Page 111 and 112: the CCFZ. Without understanding lev
Page 113 and 114: One could also make the opposite ar
Page 115 and 116: had to be mined each day. Assuming
Page 117 and 118: There was an increasing appreciatio
Page 119 and 120: whether the effects were severe in
Page 121 and 122: collect samples wherever he went in
Page 123 and 124: Forschungsverbund Tiefsee-Umweltsch
Page 125 and 126: 25. C.R. Smith et al (1997), Latitu
Page 127 and 128: esistance and resilience of seafloo
Page 129 and 130: other parameters had been recorded
Page 131 and 132: environment, a conscious effort was
Page 133 and 134: oceanographic measurements, monitor
Page 135 and 136: Chapter 4 Priorities for Environmen
Page 137 and 138: and government organisations have c
Page 139 and 140: information. On the other hand, the
Page 141 and 142: contractors (1.5 x 10 6 km 2 ). Dur
Page 143 and 144: Contractors must carefully optimise
Page 145 and 146: 3.4. Benthic and demersal community
Page 147 and 148: for environmental characterisation
Page 149 and 150: 4.2.3. Observations of marine mamma
Page 151: Local topography exerts significant
Page 155 and 156: Table 3 Benthic currents in the CCF
Page 157 and 158: 5.3.2. Benthic currents and sedimen
Page 159 and 160: polychaetes and nematodes in the co
Page 161 and 162: from the DOMES sites illustrate thi
Page 163 and 164: 5.5.1.1. Climate The climate is dom
Page 165 and 166: Surface temperatures typically reve
Page 167 and 168: process. With increasing depth, pho
Page 169 and 170: phosphorus. In the oceanic environm
Page 171 and 172: are found at about 40 m, while the
Page 173 and 174: often seen closer to land. The Paci
Page 175 and 176: square kilometres in two different
Page 177 and 178: In closing, Morgan discussed how to
Page 179 and 180: C.L. Morgan, N.A. Odunton and A.T.
Page 181 and 182: 26. Y. Morel and R. LeSuave (1986),
Page 183 and 184: 45. United States Office of Ocean M
Page 185 and 186: 68. Ibid. 69. Ibid. 70. Ibid. 71. T
Page 187 and 188: 300 m deep basins alternating with
Page 189 and 190: in water depths at or close to the
Page 191 and 192: eyond the semi-liquid layer, to whi
Page 193 and 194: 3.3. Modelling long-term propagatio
Page 195 and 196: ) Take two or three cores at each s
Page 197 and 198: facies type, which was affected by
Page 199 and 200: Another useful way to define the to
Page 201 and 202: transport would not take any partic
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Use of geological data for environm
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Mining of Polymetallic Nodules from
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About 50 scientists were involved i
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the programme was to learn the beha
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econciled with the findings of othe
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located at almost every 2-minute in
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?? Geological studies: ?? Bathymetr
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the tracks. The range and average o
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designed to minimise the plume risi
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SUMMARY OF DISCUSSION Sediment cond
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mining system would remain suspende
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design a collector. That device had
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?? For the upper layer environmenta
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Figure 1 Survey components of the u
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Figure 2. Map of the investigation
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2.4. Sample processing and size cat
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Figure 5 Schematic illustration of
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JET 3: the field study conducted on
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Besides the above, measurements wer
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3.3. Sample processing and size cat
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Figure 10. Location of the five FDC
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?? Calculation from discharged sedi
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5. Total mass of dried sediment dis
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Figure 14 Thickness contour map of
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The use of GIS has many advantages.
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than the 200-metre depth distributi
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Among the chemical parameters, the
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SUMMARY OF DISCUSSION Impact of dis
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Mining (Metal Mining Agency of Japa
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Chapter 9 Data Standards Utilised i
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the three major categories of the b
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Various kinds of equipment were bei
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for biological research, but if it
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Asked for an estimate of the microb
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Sibuet agreed with Smith, emphasisi
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Chapter 10 Data Standards Utilised
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2.1.4. High precision depth recorde
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2.2.6. Piston corer ?? Acquiring bo
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2.3.3. Geotechnical properties ?? U
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?? Concentration of cells by settle
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3.3. Zooplankton (protozoan) 3.3.1.
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?? The abundance data from the phot
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4.3. Statistical analysis Kriging w
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Figure 4 Sampling-sites map of KODO
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o Temperature ( C) o 5 N o 6 N o 7
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PRESENTATION AND DISCUSSION OF DATA
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een placed in the experimental bott
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phosphate concentration had been me
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KORDI was having trouble with a 10-
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Other environmental studies Lee sai
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Chapter 11 Data Standards Utilised
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2. Hydrochemical investigations Hyd
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and 5-6 cm. Samples from all layers
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4. Proposals 1. To evaluate environ
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second part of BIE, beginning in 20
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counted and classified into higher
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procedures could be followed for th
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PART III Environmental Parameters N
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a third trap beneath the two that h
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of a nodule-strewn plain, picking u
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Possible impacts on the pelagic com
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Chapter 12 Chemical Oceanography Dr
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To obtain quality data on metals in
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egin right from the start of the ac
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was ambient water. The system teste
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characteristics of sediments in the
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discussed by Dr. Gerald Matisoff (c
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Citing difficulties in measuring sh
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Sediment traps A participant asked
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Commenting on a suggestion to utili
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diversity at the community level. A
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Stuart and Rex 22 have shown that l
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the fauna in these samples. If the
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made up of mountain chains, faultin
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adiated extensively there in many e
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etween shelf and slope adjoined an
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een mined some time before, and con
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Another participant observed that h
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identifying species at various loca
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addition, the multi-corer was being
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20. R.J. Etter and L.S. Mullineaux
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Chapter 15 Seafloor Macrofauna in P
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Figure 2 The plough-harrow. 1. Resu
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deeper sediment and soft, partly re
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Year No. Year Phase 0 1989 Baseline
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uttons on the onboard unit so that
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a stainless steel collar with three
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the majority of samples were obtain
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whirled up into the plume may reset
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to recover (see above) and the comm
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Different methods have been propose
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For the 12 most abundant families o
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area in the southeast Pacific Ocean
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should be treated with a lot of wat
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ack-up camera, had also housed smal
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in 1992 compared to 1989. Seven yea
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distribution of the samples. Anothe
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have reacted similarly by becoming
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Another participant thought that th
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Need for a large-scale experiment A
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3. E.J. Foell, H. Thiel and G. Schr
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22. Detailed description in ibid. 2
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held in Sanya, Hainan Island, Peopl
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1.1. Meiofaunal abundance Some exam
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Central Equatorial Pacific 2° N 44
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Nematode ecological diversity is un
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discrete but morphologically simila
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too difficult to deal with and were
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Institution, had collected 148 spec
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California and the Rockall Trough),
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Another factor supposed to influenc
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shallow water, where nematodes were
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speaking, TNHM had the types for an
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samples every two days. The equipme
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marine nematologist there were 10,0
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core might have worked because the
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16. P.J.D. Lambshead (2001), Marine
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Chapter 17 Pelagic Community Impact
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1.2. Potential phytoplankton impact
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spatial variability. Sampling shoul
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2.6. Zooplankton Depth-stratified s
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helping to achieve consensus among
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One potential impact of discharging
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Consequently, in sampling these reg
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elevated levels of cadmium. It migh
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?? Marine mammals and seabirds: The
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Asked whether the impact would be d
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on some of the mesopelagic fishes.
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9. K.H. Coale (1998), The Galapagos
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PART IV Sampling, Database and Stan
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In the discussion, one participant
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The paper went on to make recommend
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1. Challenges for Developing a Base
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and impact sites were attributed to
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differential response of the commun
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etter assess the spatial extent of
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x x x x x x x x x x x x x x x x x x
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Challenges to sampling studies If p
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un. On the other hand, if test mini
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the plume, could be a large area wi
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e needed to elucidate data about do
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and he might be underestimating. An
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Chapter 19 Database Requirements Dr
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• Professional Development and Ma
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model used at the British Museum of
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Agreeing, Rex said the management o
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the importance of including informa
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Environmental concerns The Secretar
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Asking participants for their views
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A participant suggested that echino
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detritus in the oceans. Smith agree
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oceanographer, go to sea with the v
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A participant observed that, by the
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controversial items such as macrofa
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Chapter 21 Standardization Strategi
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have described methods for the stud
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a. Direct impacts along the track o
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3.3.2. Water column As the operatio
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3.6. Applications of environmental
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d. The duration of the operations w
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?? Avoiding the disturbance of the
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information for consideration and a
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?? Total inorganic carbon by coulom
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Table 2 Core sections analyzed for
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4200- 4400 4400- 4600 4600- 4800 48
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Besides their utility for impact as
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Turning to the requirements for fut
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SUMMARY OF DISCUSSION Size of envir
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Asked whether he thought the result
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2. J. S. Chung and K. Tsurusaki (19
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PART V Conclusions and Recommendati
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Chapter 22 Report of the Workshop T
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identified in square brackets [BB =
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available such information as (1) k
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y the Commission as ISBA/7/LTC/1/Re
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1. Sediment Properties Sediment pro
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Table 2 lists the chemical paramete
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4. Trace metals in benthic and epi-
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The following key parameters should
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enthic boundary layer) to evaluate
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a. Meteorological variables: sea st
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3. A.R. Hiby and P.S. Hammond (1989
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DGPS differential global positionin
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PEIS P-I POC PON PRZ QA/QC RCM RDBM
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Discipline Category Parameter Metho
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Discipline Category Parameter Metho
Page 575 and 576:
Area Parameters Instruments Levels
Page 577 and 578:
3b Parameter Variables Methodology
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